Question

What is the exact circumference of the circle?

A.
10π feet

B.
20π feet

C.
40π feet

D.
60π feet

Answer 1

Hello!

What is the exact circumference of the circle?

A.

10π feet

B.

20π feet

C.

40π feet

D.

60π feet

Solving: Using the data (Circle with center A and diameter of 20 feet labeled).

diameter = 2*radius

`20 = 2*r`

`2\:r = 20`

`r = (20)/(2)`

`\boxed{r = 10\:ft}`

Formula: (Circle length)

`\boxed{C = 2* \pi *r}`

Now, replace in the circumference length formula:

`C = 2\:\pi *r`

`C = 2\:\pi *10`

`\boxed{\boxed{C = 20\:\pi\:ft}}\end{array}}\qquad\quad\checkmark`

Answer:

B. 20π feet

`\underline{The\:exact\:circumference\:of\:the\:circle\:is\:\:20\:\pi\:ft}`

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I Hope this helps, greetings ... Dexteright02! =)