can someone explain the law of syllogism and the law of detachment for geometry???

Answers

Answer 1

Law of detachment is used when you have a conditional statement and another statement that matches the hypothesis of the conditional. ... Law of syllogism is used when you have two conditionals and the hypothesis of one matches the conclusion of the other.

Answer 2

Final answer:

In geometry, the law of syllogism allows for the combination of two conditional statements to reach a conclusion, while the law of detachment allows us to derive a conclusion from a known hypothesis and a conditional statement.

Explanation:

The Law of Syllogism and Detachment in Geometry

Both the law of syllogism and the law of detachment are forms of deductive reasoning used in geometry. The law of detachment is a process where we derive a conclusion from a single conditional statement and its hypothesis. For example, if we have a statement 'If a figure is a square, then it has four equal sides', and we know that a given figure is a square, we can deduce that this figure has four equal sides.

The law of syllogism, on the other hand, allows us to combine two conditional statements to derive a new conclusion. If we have two true statements, such as 'If an angle is acute, then it is less than 90 degrees' and 'If an angle is less than 90 degrees, then it is not a right angle', we can then conclude that 'If an angle is acute, then it is not a right angle'.

These laws form the backbone of logical reasoning in mathematics, allowing us to connect premises to reach valid conclusions and build upon established theorems and properties in geometry.


Related Questions

what is the sum value

Answers

Mean is just another way to say average. And the sum value is litterally just adding up all the numbers in a calculator.

the answer to your question 7.2

(1/x-4)(1/x-4)(1/x-4)

can you show me the work please. I looked up the answer online the answer is 1/(x-4)^3 but why is it that? like idk the steps for it

Answers

the answer is 1/(x-4)^3 because if you see in the equation they gave the same x-4 variable. As three of the same variable are being multiplied it adds the ^3 to the x-4. As (x-4) is all being divided by 1 it creates the solution 1/(x-4)^3. I hope this helps.

you are multiplying 3 algebraic fractions together

[tex]\frac{1}{x-4}[/tex] × [tex]\frac{1}{x-4}[/tex] x [tex]\frac{1}{x-4}[/tex]

multiply the numerators together, that is 1 × 1 × 1 = 1

multiply the denominators together, that is

(x - 4 ) × (x - 4 ) × (x - 4 ) = (x - 4)³

thus the product of the multiplication is

[tex]\frac{1}{(x-4)^{3} }[/tex]


If a car averages 23.2 miles per gallon of gasoline, how far can it go on 15.25 gallons?

Answers

The car goes 23.2 miles every gallon, so with 15 gallons (15 * 23.2 = 348) it can go 348 miles. With the extra .25 that the car has, it can go 0.25 * 23.2 = 5.8 miles. 348 miles plus the 5.8 miles gets you 353.8 miles on 15.25 gallons.

A car that averages 23.2 miles per gallon can travel approximately 353.8 miles using 15.25 gallons of gasoline.

If a car averages 23.2 miles per gallon of gasoline, we can calculate the distance it can travel on 15.25 gallons by multiplying the car's fuel efficiency by the amount of gasoline.

To find the distance:

Multiply the car's average miles per gallon (MPG) by the number of gallons of gasoline.

Distance = 23.2 MPG * 15.25 gallons

Distance = 353.8 miles

Therefore car that averages 23.2 miles per gallon can go approximately 353.8 miles on 15.25 gallons of gasoline.

The difference between two complementary angles is 14. Which is the measure of one of those angles?

A. 14
B. 52
C. 83
D. 90

Answers

Let the first angle be x

Sum of complementary angle is 90

Then second angle will be 90- x

As difference is 14

Therefore

x - (90-x) =14

x-90+x=14

2x = 14 +90

x = 104/2

x = 52


B due to 52-14=38 and 38+52=90

Find a unit rate A 13 ounce package of pistachios cost 5.99

Answers

take 5.99 divide by 13 and the unit rate is 0.46

Tom weighs 168.5 pounds. his 2 year old son, nickolhas, weighs 33.7 pounds. How many times as much as nickolhas does Tom weigh?

Answers

He weighs 5 times more

The answer is 5 because if you divide 168.5 divided by 33.7 without the decimals and you get 5

Use the rules of exponents to evaluate or simplify. Write without negative exponents 5 • 7^0 =

Answers

5 • 7^0 = 35^0

You would ignore the 0. And Just multiply the 7 and 5 to get 35.

If the power of any number is zero then the a⁰ is equal to 1. Then the expression 5 × 7⁰ is equivalent to 5.

What is an equivalent expression?

The equivalent is the expressions that are in different forms but are equal to the same value.

The expression is given below.

→ 5 × 7⁰

We know that if the power of any number is zero then the a⁰ is equal to 1.

⇒ 5 × 7⁰

⇒ 5 × 1

⇒ 5

More about the equivalent expression link is given below.

https://brainly.com/question/889935

#SPJ2

6 + 2(x-4) = 12 what is X

Answers

How to get answer: [tex]1. \mathrm{Subtract\:}6\mathrm{\:from\:both\:sides}\\1.5. 6+2\left(x-4\right)-6=12-6\\2. Simplify\\2.5. 2\left(x-4\right)=6\\3. \mathrm{Divide\:both\:sides\:by\:}2\\3.5. \frac{2\left(x-4\right)}{2}=\frac{6}{2}\\\\4.Simplify\\4.5.x-4=3\\5.\mathrm{Add\:}4\mathrm{\:to\:both\:sides}\\5.5. x-4+4=3+4\\6. Simplify\\6.6. x=7[/tex]


First distribute the 2 to the values inside the parentheses.

[tex]6+2(x-4)=12[/tex]

[tex]6+2x-8=12[/tex]

Combine like terms. (6+-8)

[tex]6+-8=-2[/tex]

[tex]-2+2x=12[/tex]

Add 2 on both sides of the equation.

[tex]2+-2+2x=12+2[/tex][tex]2x=14[/tex]

Divide both sides by 2.

[tex]\frac{2x}{2}[/tex]=[tex]\frac{14}{2}[/tex]

[tex]x=7[/tex]

The value of x is equal to 7.


(11 POINTS!!){MATH} {PROBABILITY}

Renee is playing a game with marbles and a spinner. The spinner has four sections: orange, black, purple, and white. The marbles are kept in a bag and come in three colors: orange, black, and purple. Renee first spins the spinner and then picks a marble from the bag without looking. What is the probability that the color of the marble matches the color on which the spinner lands?

A. 1/6

B. 1/4

C. 1/3

D. 1/2

Answers

Answer:

1/4

Step-by-step explanation:

NEED A CORRECT ANSWER NOW!!WILL MARK BRAINLIEST!!

Which sentence contains a misplaced modifier?

A. The teacher shared the poems that her students wrote.

B. My brother ate the candy that i had hidden in my dresser.

C. The children are in the art class that is held at the recreation center.

D. The dogs know several commands that take the obedience class.

Answers

D The dogs know several commands that take the obedience class.

Answer:

fvbdsnbgb

Step-by-step explanation:

please help I don't understand

Answers

Question 9: the first graph would be moving upward at a constant rate, then gradually turn into a straight line horizontally. The second chart would start off in the mid-top area, then move downwards and stop at the bottom. The explanation is that in the first graph, he is moving a distance, then when he comes to a stop, he stops moving. Hr is covering no distance over time. The second graph shows his speed, and he goes from moving to not moving, not having any speed.

Question 10: Sketch an exponential graph(a graph that constantly increases across time) moving upwards. It is an exponential graph because the distances per second keep getting larger over time.

What is the least common multiple of 7 and 4?

Answers

7 x 4 = 28

The least common multiple of 7 and 4 = 28

The answer is 28. I have to type this because it wont let me simply answer your question.

Write the word sentence as an equation. Then solve. The product of 15 and a number x is −75.

Answers

15x = -75  Divide both sides by 15.

Final answer: -5

hope that helps

Solving the product of 15 and a number x is −75 equals to: -5.

Let the number be x.

To write the word sentence as an algebraic equation:

In this exercise, we are required to translate the word sentence into a mathematical (algebraic) expression and solve for the unknown variable (number):

The product of 15 and a number x:

[tex]15(x)[/tex]

Equating the above expression to -75, we have:

[tex]15x = -75[/tex]

Simplifying further, we have:

[tex]15x = -75\\\\x = \frac{-75}{15}[/tex]

x = -5

Therefore, the unknown number is -5.

Read more: https://brainly.com/question/22970937

I need help with a review test. Could someone help out with a few answers? I'm struggling to wrap my head around this, and I have a test tomorrow

Answers

Y=x-2
-x+y=-5
The answer is no solutions because if you substitute the y-value in the second equation, you end up with -2=-5

I can help with a couple of them. You are allowed a maximum of 3 questions per request.  You will get more responses if you split the 4-page worksheet into several requests. There are 15 questions so split them into 5 requests.

***********************************************************************************************************

1) Rewrite the equations in y = mx + b format (m = slope, b = y-intercept)

Independent: one solution ⇒  different slopes

Dependent: infinite solutions (same line) ⇒  same slope and y-intercept

Inconsistent: no solutions (parallel lines) ⇒  same slope but different y-intercepts

-21x - 3y = -24  →  -3y = 21x - 24   →  y = -7x + 8   ⇒  m = -7, b = 8

y = -7x + 7  ⇒  m = -7, b = 7

same slope but different y-intercepts = parallel lines = no solution

Answer: Inconsistent

12) Eliminate a variable for equations 1 and 2, then eliminate the same variable for equations 2 and 3. You will end up with two new equations and two variables.  Solve that system by eliminating one of the variables (using any method) and solving for the remaining variable. Then plug that answer into one of the new equations. Then plug in both those answers into one of the original equations.

EQ1:  x + 3y + 2z = 8   →       1(x + 3y + 2z = 8)   →    x + 3y + 2z = 8

EQ2: 3x +  y + 3z = -10  → -3(3x +  y + 3z = -10) → -9x -  3y - 9z = 30

                                                 NEW EQ 1,2:        -8x          -7z = 38

EQ2:  3x + y + 3z = -10  → 2(3x +  y + 3z = -10) →  6x + 2y + 6z = -20

EQ3: -2x - 2y -  z =  10   → 1(-2x - 2y - z = 10)  →  -2x  - 2y  -  z  =   10

                                                NEW EQ 2,3:        4x          +5z =  -10

NEW EQ 1,2:  -8x - 7z = 38   →   1(-8x - 7z = 38)   →   -8x  -  7z =  38

NEW EQ 2,3:  4x + 5z = -10  →   2(4x + 5z = -10)  →    8x + 10z = -20

                                                                                             3z  = 18

                                                                                               z = 6

NEW EQ 2,3: 4x + 5z = -10 ⇒ 4x + 5(6) = -10 ⇒ 4x + 30 = -10 ⇒ 4x = -40 ⇒ x = -10

EQ1: x + 3y + 2z = 8  ⇒  (-10) + 3y + 2(6) = 8  ⇒  3y + 2 = 8  ⇒  3y = 6  ⇒  y = 2

Answer: x = -10, y = 2, z = 6

Your class has 30 students. If 13 of them walk to school, how many students in your class walk to school?

Answers

Out of a class of 30 students, 13 students walk to school. This is the exact number provided in the question itself.

The question asks how many students in your class walk to school if the class has 30 students and 13 of them walk to school. The answer to this is quite straightforward: if 13 students out of the 30 walk to school, then the number of students who walk to school is 13. There's no need for complex calculations or additional data; the information provided directly gives us the answer.

10 students in your class walk to school.

To calculate [tex]\( \frac{1}{3} \)[/tex] of the total number of students walking to school, you multiply the total number of students by [tex]\( \frac{1}{3} \)[/tex].

Given there are 30 students in total, we multiply 30 by [tex]\( \frac{1}{3} \)[/tex]:

[tex]\[ 30 \times \frac{1}{3} = 10 \][/tex]

This means that [tex]\( \frac{1}{3} \)[/tex] of 30 students equals 10 students. So, in your class of 30 students, 10 of them walk to school.

This calculation is based on the principle that multiplying a number by [tex]\( \frac{1}{3} \)[/tex] or dividing by 3 is equivalent. So, dividing 30 by 3 gives us 10. Therefore, [tex]\( \frac{1}{3} \)[/tex] of 30 is 10.

The probable question may be:

Your class has 30 students. If 1/3 of them walk to school, how many students in your class walk to school?

Could someone explain this to me????

Answers

Answer:

Your answer would be 265

Step-by-step explanation:


Your answer would be 265 because knowing that the lowest temp is a negative number, and you're trying to find the difference between a positive number from a negative number, you would have to add a number to -129 to cancel it out and make it 0. The only number that would do so would be 129. Then by using 129, add 136 to it and you will get your answer, I hope this helps :)

Mariah bought 7 books $11.20 each. Find the total cost of the 7 books. Justify your answer by using the Distributive Property.

Answers

Answer

Let's just get the answer so that you see what we are trying to do with the distributive property.

Cost = C = n (number of books) * Cost of 1 book.

Cost = 7 * 11.20

Cost = 78.40

Distributive Property

11.20 * (4 + 3)

11.20 * 4 + 11.20 * 3

44.80 +33.60

78.40 which agrees with the multiplication answer

To calculate the total cost we have to multiply 7 books by the cost of each book​

Total = 7*$11.20 = $78.4​

Answer : $78.4

Hope this helps!​​​​​

[tex]\textit{\textbf{Spymore}}[/tex]​​​​​​​

What is the prefix of wilderness

Answers

I believe the answer is Wild

I think it is “wild”, but I’m not the best at english :)

2v+18=16-4(v+7) how does one do this

Answers

v = - 5

distribute right side of equation and simplify

2v + 18 = 16 - 4v - 28

2v + 18 = - 12 - 4v ( add 4v to both sides )

6v + 18 = - 12 ( subtract 18 from both sides )

6v = - 30 ( divide both sides by 6 )

v = [tex]\frac{-30}{6}[/tex] = - 5


Final answer:

The given equation is a linear algebra problem. By distributing, simplifying, and isolating the variable, we find that the solution to the equation 2v+18=16-4(v+7) is v = -5.

Explanation:

The question is a linear algebra equation that you can solve by following these steps:

Distribute -4 to both v and 7 in the equation. You get 2v+18 = 16 - 4v -28. Simplify each side of the equation. 2v+18 becomes 2v+18 and 16 - 4v -28 simplifies to -4v -12. Transfer all the v values to one side and numeric values to the other. This results in: 2v + 4v = -12 - 18. Simplify again. You get 6v = -30.Isolate v by dividing both sides of the equation by 6. Thus, v = -30/6 = -5.

So, the solution for the equation is v = -5.

Learn more about Linear Algebra Equation here:

https://brainly.com/question/34459204

#SPJ3

If Ruben has 6 new books for his collection. This increases his collection by 12%. How many books does he have now?

Answers

He has 56 books now

If we make a proportion where 6/x=12/100, we can solve for x which will be the 100% or all of the books Ruben has

But now, there are 6 new books making the total 56

Clara and Toby are telemarketers. Yesterday, Clara reached 4 people in 10 phone calls, while Toby reached 3 people in 8 phone calls. If each telemarketer continues at the same rate, who will reach more people in 40 calls?How many more?

Answers

I hope this helps you.


4/10 = .4

3/8 = .375

.4 > .375, so Clara will reach more people

Another way to look at it:

4/10 * 40 to 4 * 4 = 16 people reached

3/8 * 40 to 3 * 5 = 15 people reached

Answer: Clara will reach more people with 1 more

Step-by-step explanation:

To solve this question, we will find the total number of people Clara can reach in 40 calls and we will also find the total number of people Toby can reach in 40 calls and then we will compare the two to be able to determine who can reach more people in the 40 phone calls.

We can use proportion to find the total number of people Clara reached in 40 calls

Let x be the total number of people Clara can reach in 40 phone calls

Since Clara can reach 4 people in 10 phone calls. Then;

4 people = 10 calls

     x        =  40 calls

cross multiply

10 × x   =   40 × 4

10x       =     160

Divide both-side of the equation by 10

10x/10  =  160/10

x =  16

The number of people Clara reached in 40 calls is 16

Now, we can also use the same method to get the number of people Toby can reach in 40 calls.

Let x represent the number of people Toby can reach in 40 calls.

Since Toby can reach 3 people in 8 calls. Then;

3 people =  8 calls

  x           = 40 calls

cross multiply

8  ×  x   =  40 ×  3

   8x    =  120

Divide both-side of the equation by 8

8x/8  =  120/8

x =  15

The number of people Toby can reach in 40 calls is 15.

Now compare;

Clara can reach 16 people in 40 calls

Toby can reach 15 people in 40 calls

Therefore, Clara can reach more people  than Toby in 40 calls

Clara can reach more people in 40 calls with 1 more person

What is 4/9 - (-2/9)

Answers

Hello!


[tex]\frac{4}{9}-\frac{2}{9}[/tex]

First you had to used apply rule -(-b)=b

[tex]\frac{4}{9}+\frac{2}{9}[/tex]

Since the denominators are equal to it should be combine by the fractions.

[tex]\frac{4+2}{9}[/tex]

Then add 4+2=6

[tex]\frac{6}{9}[/tex]

[tex]\frac{4}{9}-\frac{-2}{9}[/tex]

Finally you had to cancel by the common factor of 3.

[tex]=Answer--->\frac{2}{3}[/tex]

Hope this helps! And thank you for posting at here on Brainly. And have a great day! -Charlie :)

what is the square root of 864

Answers

There are two ways to evaluate the square root of 864: using a calculator, and simplifying the root.

The first method is simplifying the root. While this doesn't give you an exact value, it reduces the number inside the root.

Find the prime factorization of 864:

[tex]\sqrt{864} = \sqrt{2 \cdot 2 \cdot 2 \cdot 2 \cdot 2 \cdot 3 \cdot 3 \cdot 3}[/tex]

Take any number that is repeated twice in the square root, and move it outside of the root:

[tex]\sqrt{864} = \sqrt{(2 \cdot 2) \cdot (2 \cdot 2) \cdot 2 \cdot (3 \cdot 3) \cdot 3}[/tex]

[tex]\sqrt{2 \cdot 2} = \sqrt{4} = 2[/tex]

[tex]\sqrt{3 \cdot 3} = \sqrt{9} = 3[/tex]

[tex]\sqrt{(2 \cdot 2) \cdot (2 \cdot 2) \cdot 2 \cdot (3 \cdot 3) \cdot 3} = \sqrt{(4) \cdot (4) \cdot 2 \cdot (9) \cdot 3}[/tex]

[tex]\sqrt{(4) \cdot (4) \cdot 2 \cdot (9) \cdot 3} = (2 \cdot 2 \cdot 3) \sqrt{2 \cdot 3} = \boxed{12 \sqrt{6}}[/tex]

The simplified form of √864 will be 12√6.

The second method is evaluating the root. Using a calculator, we can find the exact value of √864.

Plugged into a calculator and rounded to the nearest hundredths value, √864 is equal to 29.39. Because square roots can be negative or positive when evaluated, this means that √864 is equal to ±29.39.

What is 8.57x10-⁴ in standered form ?

Answers

Kaleerain5,

In order to get your answer you must remember that if the exponent is negative move to the left and if the exponent is positive you have to move to the right.

[tex]8.57 \times 10^{-4}[/tex]The exponent is negative so move to the left:[tex]8. = .8 = .08 = .008 = .0008[/tex][tex]= .000857[/tex]

Therefore your answer is ".000857."

Hope this helps!

Can you help me find x and possibly explaining how to

Answers

Answer:

X = 8

Step-by-step explanation

First thing to do, is add 7 to both sides to make it -1/2X=-4. Then multiply both sides by the reciprocal (flip fraction) to make it X = 8. Because when you multiply -4 by -2/1 (or just -2) you get 8. Hope I helped! :D

-12=-2v

whats the value of v

Answers

6 because -12/-2 would be positive 2

V=6

divide both sides by -2 to get variable v on one side

-12/-2=6

Solve the Following Equation
2.8=2y
1.y=1.4
2.y=1/2
3y=2.8
4.y=0.6

Solve the following Equation
-3=x/5
1.x=-9/4
2.x=-15
3.x=-3/5
4.x=15

Answers

Answer:

2.8 = 2y

1. y= 1.4

Answer:

-3 = x/5

x= -15

Explanation:

To find the variable use the opposite function so if its multiplication find x by dividing and vice versa for division


Martin is $300 in debt he needs to get the depth down to no more than $100 within the next 8 months if he pays the same amount each month what is the minimum he must pay off each month to manage this

Answers

Divide the amount he has to pay off with the 8 months. That is 200 divided by 8 which is 25. He has to pay 25 each month.

M has to pay at least $200 against his debt over the 8 months. If he is to pay every month the same amount, he must pay (at least) 200/8 = $25 per month to meet his goal

What is the estimate of 19.7-6.9

Answers

The estimate for the subtraction of 19.7 from 6.9 is approximately 13.

To estimate the difference between 19.7 and 6.9, we can round each number to the nearest whole number first. The number 19.7 rounds to 20, and 6.9 rounds to 7. Subtraction of these two estimates gives us:

20 - 7 = 13.

Therefore, the estimate for the subtraction of 19.7 from 6.9 is approximately 13.

helpppp :( 3(x-1) = 2x+9

Answers

x equals 12 because

3x-3= 2x+9

x=12

3(x-1) = 2x+9                  Remove the Brackets on the left

3x - 3 = 2x + 9               Add 3 to both sides

3x = 2x + 9 + 3              Collect like terms

3x = 2x + 12                   Subtract 2x from both sides.

3x - 2x = 2x-2x + 12

x = 12


Other Questions
......Help Please..... In a dictatorship how is the rule of law regarded Write a brief, two-paragraph response to the presidents fireside chat. Discuss whether you think his speech was effective, and why or why not. Use details from the reading to support your conclusion. Evaluate the square root Take your time to answer this!! I'll be waiting!! (98 Points) ~Biology~Suppose that you found a vertebrate fossil and brought it to an expert. The expert showed you that the joint structure of the fossil was similar to the joint structure of a modern squirrel. Infer the kinds of movements for which the animal had been adapted. Explain your inferences in a paragraph. Assume the following for the town of Boone: it has a total population of 60,000 people, of which 4,000 are under 16 years of age or are institutionalized; 4,000 are full-time students who are not employed and are not seeking work; and 50,000 are employed. The rest of the people are out of work but have been actively seeking work within the past four weeks.What is Boone's unemployment rate? There ar 23 students and a student admission ticket is 8$ how much will the student tickets cost Adam invests $6139 in a retirement account with a fixed annual interest rate compounded continuously. After 17 years the balance reaches $8,624.97. What is the interest rate of the account? Help! Working out required. step by step explanation please :-DSolve the equation. Check for extraneous solutions.9|9 8x| = 2x + 3 ASAP!!!! I need to get this in really fast!!!Empareja la forma correcta de saber o conocer para completar la frase. Match the correct form of the verb saber or conocer to complete the sentence. (4 points)1.Santiago ________ la msica reggaetn.2.Carolina ________ hablar francs.3.Jordn, Sofa y yo ________ escribir los ensayos.4.Isabela y yo ________ la ciudad de Nueva York.a.sabeb.conocec.conocemosd.sabemos Round each decimal number to the nearest hundred 8.314 To enter a local fair, one must pay an entrance fee and pay for the number of ride tickets he/she wants. Admission to the fair is given by the equation f(x) = .50x + 10, where x represents the number of tickets purchased and f(x) represents the total price. How much does each ride ticket cost?A)$10B)$0.50C)$10.50D)Not enough information. PLEASE HELP!!!!People began arriving in North America as permanent settlers, beginning in the early 1600s. Explain the differences among the three waves of migrants -- the wave they were immigrating in, where they were coming from, reasons they chose to migrate to North America, and how they differed in the new land from previous migrants. what is lamott's THESIS? Excerpt from A Baker's Dozen David Matherne "Had everything but the panting. And the drool. Too much caffeine I suppose. Too happy." If the author wanted to change this portion, which is the BEST way to combine these sentences? "Had everything but the panting. And the drool. Too much caffeine I suppose. Too happy." A)He had caffeine and happiness but no panting or drool. B)He had everything: panting, drool, caffeine and was happy. C)He had drooling but no panting. He had caffeine and happiness. D)He had everything but the panting and the drool; he also seemed overly happy, perhaps from too much caffeine. what roles do the women play in Beowulf? explain how predators differ from parasites. give an example of each kind of organism Research has supported that self-report inventories need more comparative data in order to meet the criteria of a psychological test. true or false HELP EASY QUESTION JUST NEED TO BE SURE PLEASE REASSURE ME IT IS RIGHT!! :) Which of these is likely to happen in the absence of the stratosphere? We may have to bear the impact of a meteorite. We may not experience storms, winds, and clouds. Mixing of air due to convection currents may stop. Increased exposure to radiation may cause skin ailments. is a spotlight used to shed light on the main subject or area of filming. The is placed behind the subject to illuminate the area behind the subject.