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Question

HELP ME WITH MY MATH PLEASE!!!!!
Write and solve an equation to find the radius of the circle given the circumfrence C. Use the radius to find the area or the circle.
Use 3.14 for pi.

1.) C = 56.52 inches

2.) C= 144.44 meters

3.) C = 184.632 centimeters

Answer 1

you can do your own homework, but
C = 2*pi*radius
so just rearrange that to get the radius

Answer 2

The equation you use to find the radius :

C = 2 x pi x r ( x stands for times)

Then, r = C / 2 x pi ( / stands for divides)


Question 1.
For C = 56.52 inches, r = 56.52 / 2 x 3.14
r = 9.02 inches
Area of circle = pi x r squared
= 3.14 x 9.02 inches squared
= 255.47 inches squared

Question 2.
For C = 144.44 meters, r = 144.44 / 2 x 3.14
r = 23 meters
Area of circle = pi x r squared
= 3.14 x 23 meters squared
= 1661.06 meters squared

Question 3.
For C = 184.632 centimeters, r = 184.632 / 2 x 3.14
r = 29.4 centimeters
Area of circle = pi x r squared
= 3.14 x 29.4 centimeters squared
= 2714.09 centimeters squared

Hope it helps....

Answer 3

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Answer 4

The circumference of a circle is given by the formula

C = 2pi(r)

1) Since C = 56.52, then if we plug this into the circumference formula

C = 2pi(r), then
56.52 = 2pi(r)

To solve for r, we divide both sides by 2pi, getting
(56.52)/(2pi) = r

Use your calculator to reduce that.

Now, try 2 and 3 on your own.

Answer 5

Ok here goes...
Circumference = 2 x pi x r
divide both sides by 2 x pi and get:
C/2 x pi = r

Now you can plug in your values for C and you get
1.) 56.52/6.28 = r
2.) 144.44/6.28 = r
3.) 184.632 = r

I'll let you do the rest. Make sense?
Good Luck!

Answer 6

Here's how to solve it ...

First, find the radius by plugging C into this formula ....

d = C / pi

thus r = d/2

Area of circle is: r*r*pi

---------------------

Sleep through your math class lately?

Answer 7

C=(pi)r^2
56.52=(pi)r^2
Divide each side by pi=3.14
r^2=18
Take the square root of each side.
r=4.24 in.

Do the same for the next two problems.

I hope that this helps.

Answer 8

do C/ pi then divide it by 2

Answer 9

Try burning some brain cells.

You have billions that you'll never use over your life time.

Don't waste them now.

Answer 10

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