Mathematics Middle School

How do you tell a triangle is not a right triangle

Answers

Answer 1
You can tell when you cant draw an even L shaped figure at the intersects of the bottom and the side. 90 degrees. But there are many different ways that may make more sense. Happy to help:)
Answer 2
Hi! :)

So a right triangle is classified as a right triangle because it has one right angle. You can tell if it's not a right triangle by the angle measurements. If all the angles are above or below 90 degrees, it's not a right triangle. If one of the angles is 90 degrees, it's classified as a right triangle.

Hope this helps!

Related Questions

what is the answer to this question ?

Answers

If there is a really short way of doing this, I don't see it. The only way I know to do it is to find the third angle of both triangles. 

So for F the third angle for each of the pairs is
left side: 180 - (51 + 30) = 180 - 81 = 99
right side: 180 - (109 + 30) = 180 - 139 = 41
This is not the answer.

G
180 - (92 + 70) = 180 - 162 = 18
180 - (28 + 70) = 180 - 98 = 82
This is not the answer either.

H
180- (58 + 30) = 180 - (88) = 92
180 - (90  + 58) = 180 - 148 = 32
Not at all.

180 - (35 + 82) = 180 - 117 = 63
180 - (82 + 63) = 180 - 145 = 35
This pair has a third angle that is equal to the other triangle's pair. This is your answer.

Cougar Park is shaped like a parallelogram and has an area of 1/10 square mile. It’s base is 3/8 mile. What is its height?

Answers

To find the missing dimension (the height) you can use the formula A=bh and substitute and let you know. 1/10=3/8h. To find the missing factor (h) you will divide both sides by 3/8. 1/10 divided by 3/8 is the same as 1/10 x 8/3. The answer is 4/15 mile. You show this has h=4/15 mi.
4/15 Miles
The formula for the area of a parallelogram is A=b*h. We plug in the information that we know and solve for the missing height.
[tex] \frac{1}{10}= \frac{3}{8}*h [/tex]
Multiply both sides by the reciprocal of 3/8 which is 8/3 so it is canceled on the right side.
[tex]\frac{8}{3}*\frac{1}{10}= h [/tex]
multiply the factions to get 8/30. 8 and 30 have common factors of 2 and can reduce to 4/15

Two cars are traveling along the same highway. The distance, d, in miles, from San Francisco after h hours spent driving is described for each car below.

Car A:
d = 60h + 20

Car B: h d
0 60
2 160
4 260

Select three statements that are true.

A.Car A is traveling at the same rate, in miles per hour, as Car B.

B.Car A is traveling at a faster rate, in miles per hour, than Car B.

C. Car A is traveling at a slower rate, in miles per hour, than Car B.

D.Car A is originally closer to San Francisco than Car B.

E .Car A is originally at the same distance from San Francisco as Car B.

F.Car A and Car B are at the same distance away from San Francisco after 4 hours.

Answers

The answers are A,D,F
Final answer:

Car A is traveling faster at the checkpoint because it must go past the speed of car B to reach the same distance.

Explanation:

Car A is traveling faster at the checkpoint because it must go past the speed of car B to reach the same distance.

To determine which car is traveling faster at the checkpoint, we need to compare their velocities. Car A has a positive, constant acceleration, which means its velocity is increasing. Car B, on the other hand, travels at a constant speed, which means its velocity remains the same.

Therefore, Car A is traveling faster at the checkpoint than Car B.

Help ASAP!!
[tex]3 - 1 \times \frac{3}{5} = [/tex]

Answers

The answer is:
1 2/5 or 1.4

i need this rotated 270 degrees clockwise

Answers

270° CW is the same as 90° CCW. The mapping for that is (x, y) ⇒ (-y, x).

D(1, 2) ⇒ D'(-2, 1)
F(2, 3) ⇒ F'(-3, 2)
G(4, 1) ⇒ G'(-1, 4)

what she got to school she saw that the school has nine buildings each Heaven 30 classrooms how many classrooms does the school have

Answers

Just do 9*30 which is 270 classrooms

Final answer:

To find the total number of classrooms in the school, we multiply the number of buildings (9) by the number of classrooms in each building (30), resulting in a total of 270 classrooms.

Explanation:

The question asks how many classrooms are there in total if a school has nine buildings, each with 30 classrooms. To find the answer, we need to multiply the number of buildings by the number of classrooms in each building. This calculation is straightforward:

Multiply the number of buildings (9) by the number of classrooms in each building (30).

This gives us: 9 buildings x 30 classrooms/building = 270 classrooms in total.

Therefore, the school has a total of 270 classrooms.

What is the total cost or sale price to the nearest cent 20$ haircut; 15% tip

Answers

$20 hai
The answer is $23.00

What is the square of 2/3 I really need help I’m so confused

Answers

6 under radical sign/3 

Which relationship describes angles 1 and 2?

Select each correct answer.

adjacent angles
vertical angles
complementary angles
supplementary angles

Answers

The answer is adjacent angles

The line plot shows the number of hours two groups of teens spent studying last week.

How does the data compare for the two groups of teens?


A)The range for the hours spent studying last week for the 13- to 15-year olds is the same as the range for the hours spent studying last week for the 16- to 18-year olds.

B)The median value for the hours spent studying last week for the 13- to 15-year olds is greater than the median value for the hours spent studying last week for the 16- to 18-year olds.

C)The mode for the hours spent studying last week for the 13- to 15-year olds is less than the mode for the hours spent studying last week for the 16- to 18-year olds.

D)The 13- to 15-year olds spent an average of 14 hours studying last week.

Answers

I think the answer is b.
The correct answer is B.
I took this test☺
Hope this helps if it did plz mark brainliest so I can help more people.☺

what is the answer to Divide 2800 by 10

Answers

the answer that you should get is 280.
the answer is 280 thats the answer

what value of c makes x^2 - 24x + c a perfect square trinomial?

Answers

Divide 24 by two and square it
The answer is 144

Answer:

Step-by-step explanation:

Quadratic equation is given by x²-24x+c

This is in the form expansion of (a-b)², that is a²-2ab+b²

Comparing

            a² = x²,    a = x

            -2ab = -24x

             -2xb = -24x

                  b = 12

           c = b² = 12² =144

   x²-24x+144 = (x-12)²

Option D is the correct answer

HELP MEEEEEEEEEEEEEEEEEEE @Louli Just give the answer!!

Answers

Y= -3x
Hope this help
Answer:
y = -3x - 3

Explanation:
The equation of line in slope-intercept form is:
y = mx + c
where:
m is the slope
c is the y-intercept

1- getting the slope:
To get the slope, we will need two points from the curve. I will choose points (-1,0) and (-2,3)
slope = (y2-y1) / (x2-x1) = (3-0) / (-2--1) = -3
The equation now is:
y = -3x + c

2- getting the y-intercept:
The y-intercept is the value of y at x = 0. From the graph, we can directly get this value.
y-intercept = c = -3

Based on the above, the equation of the line is:
y = -3x - 3

Hope this helps :)

What is the circumference of the circle? Round your answer to the nearest foot

Answers

it would be 78.5 because if you do the work for example here is work i did for a question on my quiz


Where "C" is circumference and "d" is diameter.

Substituting your values in, we have:



Which, when rounded, is 37.7.
 thats my work but when you do your work for your question you get 78.58 and you would round to the nearset tenth and you get 78.5

Hope this helps:) please mark branliest would really apperciate it thx

using the distributive property to find the product (y-4)(y^2+4y+16) results in a polynomial of the form y^3 + 4y^2 + ay - 4y^2 - ay - 64 what is the value of a in the polynomial

Answers

(y-4)(y^2+4y+16)
y^3+4y^2+16y-4y^2-16y-64=y^3+4y^2+ay-4y^2-ay-64
Comparing the coefficients: a=16
Answer: The value of a in the polynomial is 16

Answer:d

Step-by-step explanation:

the gift shop at a science museum sells lollipops that are made to look like the plants. Each lollipop is shaped like a sphere and has a radius of 12 mm

What is the volume of each lollipop?

Answers

The answer is 2304pi

The volume of the lollipop having the radius of 12 mm is 7241.14 [tex]mm^{3}[/tex].

What is volume?

Volume is the capacity of a container to hold something in its capacity. Like a drum can hold water.

How to calculate the volume of lollipop?

The radius is given as 12 mm. The lollipop is having shape of sphere. The formula of volume of sphere is 4/3π[tex]r^{3}[/tex].

Volume =4/3π[tex]r^{3}[/tex].

Volume of lollipop is 4/3π[tex]12^{3}[/tex]

=4/3*22/7*576

=(88*1728)/21

=152064/21

=7241.14[tex]mm^{3}[/tex].

Hence the volume of lollipop having radius of 12 mm is 7241.14[tex]mm^{3}[/tex].

Learn more about volume at https://brainly.com/question/463363

#SPJ2

The two triangles below are similar. Which pair are corresponding sides?

LN and MN
MN and QR
LM and QR
LM and PQ

Answers

MN and QR are corresponding :-)

Answer:

2) MN correspond to QR .

Step-by-step explanation:

Given : The two triangles below are similar.

To find : Which pair are corresponding sides

Solution : We have given that Triangle LMN is similar to triangle PQR.

Then Sides

MN correspond to QR .

Therefore, 2) MN correspond to QR .

Sarah folds this pattern into a square pyramid. What is the surface area of Sarah's pyramid?
A. 161 sq. Inches
B.224sq.inches
C. 112sq.inches
D.273sq.inches

I need the answer really fast gets a brain list plz

Answers

To find the surface area you would need to find the area of all five shapes that create this net. The four triangles are congruent so you really are finding the area of one triangle x 4 and one square. Please see the attached paper for the work.

Solve the quadratic equation by completing the square.
x^2 - 10x + 18 = 0

Answers

Okay so basically, you subtract 18 on both sides since the 18 doesn't work, making the equation 
x² - 10x = -18
So then you add (b/2)², which is 25, to both sides, to get 
x² - 10x + 25 = 7
After this, you factor.
(x-5)(x-5) = 7
Then you simplify.
(x-5)² = 7
Then you solve for x.
√(x-5)² = √7
x-5 = (+ or -)√7

~ x= 5 (+ or -)√7 ~

Hope this helps!

HELP ASAP!!!

1: What is the surface area of a sphere with a radius of 4 meters rounded to the nearest square meter
A: 50 m^2
B: 101 m^2
C: 201 m^2
D: 268 m^2

2: What is the volume of a sphere with a radius of 6 meters rounded to the nearest square meter?
A: 905 m^3
B: 679 m^3
C: 452 m^3
D: 226 m^3

Answers

Q1)
the surface area of the sphere can be calculated using the following equation 
Area = 4πr²
where r = radius
π = 3.142
radius of the sphere = 4 m
substituting radius in the area equation 
Area = 4 x 3.142 x 4²
        = 201.08 m²
when rounded off to nearest sq.meter , 201.08 ≈ 201
answer is C. 201 m²

Q2)
volume of the sphere can be calculated from the following equation
V = 4/3 πr³
 radius of sphere = 6 m
π = 3.142
V = 4/3 x 3.142 x 6³
   = 904.8 m³
rounded off to nearest sq. meter 
904.8 ≈ 905 m³
correct answer is A

PLEASE HELP ME!! A right circular cone has a radius of 6 inches and a volume of 180 cubic inches. What is the height of the cone? Please answer without using pi. Thank you

A. 5 in.
B. 15 in.
C. 25 in.
D. 90 in.

Answers

Volume of the cone = [tex] \frac{1}{3} \pi x^{2} h[/tex]

Given that the volume is 180 cubic inches
[tex] \frac{1}{3} \pi r^{2} h[/tex] = [tex]180[/tex] 

Given that the radius is 6m
[tex] \frac{1}{3} \pi 6^{2} h[/tex] = [tex]180[/tex] 

Evaluate 
[tex] \frac{1}{3} \pi (36) h[/tex] =  [tex]180[/tex] 
[tex] 12\pi h[/tex] =  [tex]180[/tex] 
[tex] h[/tex] =  [tex]180[/tex]  ÷ ([tex] 12 \pi [/tex])
[tex] h[/tex] = 4.77  ≈ 5 inches (Answer A)


Option B.The height of a cone is 15 inches.

To find the height of the cone, we will use the formula for the volume of a cone:

V = (1/3) * π * r² * h

We know the volume (V) is 180 cubic inches and the radius (r) is 6 inches.
We need to solve for the height (h).
First, let's plug in the known values:

180 = (1/3) * π * (6)² * h

180 = (1/3) * π * 36 * h

540 = π * 36 * h

540 / 36π = h

We can simplify this further, h = 15/π. Since we do not use π for the answer:

By rational observation of given options, B. 15 in. seems accurate.


PLEASE HELP!!!!

Beth’s final exam is worth 140 points. It consists of 40 questions. Each multiple choice question is worth 2 points, and each word problem is worth 5 points. How many of each kind of question are on the test?

Answers

They had 20:2 point problems. They also had 20:5 point problems.




​

−2x+15y=−24
2x+9y=24
​

what do y and x equal?

Answers

X=12 y=0
Hope this helps

a 56 inch board is to be cut into three pieces so that the second piece is three times as long as the first piece and a third piece is four times as long as the first piece if x represents the length of the first please find the length of all three pieces

Answers

x + 3x + 4x = 56
8x = 56
x = 7

The shortest piece is 7 inches
The middle piece is 7*3 = 21 inches.
The longest piece is 4*7 = 28 inches

Check
7 + 21 + 28 = 56 It does check and the lengths are correct.

Greg started with a certain number of quarters. He then decided on a number of quarters he would save each day. He added the quarters he saved to the amount with which he started. At the end of day 2, Greg had a total of 26 quarters saved. At the end of day 5, he had a total of 35 quarters saved.

A. How many quarters does Greg start with? Show or explain your work.

B. Write an equation to model the number of quarters Greg has saved, y, after x days.

C. Using the rate at which Greg is saving, explain why he can never have exactly 100 quarters saved by the end of any given day.

Answers

Final answer:

Greg started with 20 quarters. The equation for the number of quarters saved after x days is y = 20 + 3x. With Greg's savings rate of 3 quarters per day, he cannot have exactly 100 quarters on any day since 100 is not a multiple of 3 plus the 20 starting quarters.

Explanation:

To determine how many quarters Greg started with, let 's' be the number quarters Greg started with, and 'd' be the number of quarters he saves each day. After 2 days, he had a total of 26 quarters saved, and after 5 days, he had a total of 35 quarters saved. These can be written as two equations:

s + 2d = 26s + 5d = 35

Subtracting the first equation from the second gives:

3d = 9

From which we find that d = 3 (Greg saves 3 quarters a day). Plugging this value back into the first equation:

s + 2(3) = 26

s + 6 = 26

s = 20

Greg started with 20 quarters.

B. The equation to model the number of quarters Greg has saved, y, after x days is:

y = 20 + 3x

C. With the savings rate of 3 quarters a day, Greg's total will always be a multiple of 3 plus the 20 he started with. 100 is not a multiple of 3, meaning he can never save exactly 100 quarters by the end of any given day since 100 minus the 20 quarters he started with leaves 80, which is not divisible by 3.

Final answer:

Greg started with 20 quarters and saves 3 quarters every day afterward. The equation to model the number of quarters saved after x days is y = 20 + 3x. It is impossible for Greg to have exactly 100 quarters saved by the end of any given day because 100 cannot be reached by adding multiples of 3 to the starting amount of 20 quarters.

Explanation:

To solve for the number of quarters Greg started with and the number of quarters he saves each day, we can set up a system of equations. Let's designate q as the number of quarters Greg started with and d as the number of quarters he saves each day. From the problem, we have two points of data: On day 2, Greg has 26 quarters, and on day 5, he has 35 quarters.

The equations representing these two data points are:

q + 2d = 26q + 5d = 35

Subtracting the first equation from the second gives us:

3d = 9

Dividing both sides by 3 gives us:

d = 3

Now that we have the value for d, we can substitute it back into the first equation:

q + 2(3) = 26

q + 6 = 26

Subtracting 6 from both sides gives us:

q = 20

Greg started with 20 quarters.

For the equation to model the number of quarters saved, y, after x days, we have:

y = q + dx

This simplifies to:

y = 20 + 3x

To address part C, let's analyze the possibility of Greg having exactly 100 quarters saved. If we set y to 100 in the equation y = 20 + 3x and solve for x, we get:

100 = 20 + 3x

80 = 3x

x = 80/3

x ≈ 26.67

Since x must be an integer because Greg cannot save a fraction of a day, he cannot have exactly 100 quarters by the end of any given day. This is because 100 is not a multiple of 3 (the daily amount Greg saves) when starting from 20. Thus, it's impossible for Greg to have exactly 100 quarters saved by the end of any given day.

What is the average speed in miles per hour of a car that’s travels 956.4 miles in 15.9 hours? Round the answer to nearest tenth , explain step by step how to solve it

Answers

956.4 / 15.9 = 60.1509434
rounded = 60.2

Smoked salmon is being sold for $15.50 per pound. What is the cost of 6 ounces of salmon?.

Answers

1 pound = 16 ounces

15.50 / 16 = 0.96875 per ounce

0.96875 * 6 = $5.81

Convert 3 feet to inches.
A) 4 inches
B) 9 inches
C) 12 inches
D) 36 inches

Answers

1 foot = 12 inches
 3 feet x 12 inches = 36 inches

answer is D

In every foot, there’s 12 inches. Since there are 3 feet, there are three 12 inches. We have to multiply 3 by 12 to find the total amount of inches.
3•12=36
D), there are 36 inches in 3 feet.

107=5x+17 simplify your answer as much as possible

Answers

107-7=90
90divided 5=18
18*5=90+17=107
I did the work ♥♥♥♥
x=18
5*18=90
90+17=107

Double a penny every day for 30 days. How many dollars do you have

Answers

$10, 737, 418.24 after 30 days
2x30=60
If I have this correct it is just 2 pennies which is each one cent multiplied by 30
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A metal surface becomes dull on exposure to air. phyiscal or chemical change? The electrolyte of the following is:A: KCl. B: Mg(NO3)2. C: NH4OH. D: all of the above What physical process changed the geological area and composition of the Earth's oceans shown in the two pictures below How does the rock cycle transform rocks from one type to another? Help! *50 points for whoever can help!*( Please number the answers so I know which is which. 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What does it have to do with a club? Please Help. I appreciate it.The title "Another Evening at the Club" is close in meaning to "Just Another Evening at the Club." Given the events of the story, what is the significance of this meaning? What is 6 divided by 1/3 how might a playwrights use of meter help the audience? Which line from Utopia is an example of an anecdote? The folly of men has enhanced the value of gold and silver because of their scarcity; whereas, on the contrary, it is their opinion that Nature, as an indulgent parent, has freely given us all the best things in great abundance . . . It is certain that all things appear incredible to us in proportion as they differ from known customs; but one who can judge aright will not wonder to find that, since their constitution differs so much from ours, their value of gold and silver should be measured by a very different standard . . . 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