Question

Find the exact area of the circle with the given diameter.

d = 12.6 cm

A.

39.69 cm2

B.

158.76 cm2

C.

158.76π cm2

D.

39.69π cm2

Answer 1

@iGreen.

Answer 2

@AnswerMyQuestions

Answer 3

\(A = \pi r^2\)

Diameter is twice the radius, so 12.6 / 2 = 6.3

\(A = \pi 6.3^2\)

Multiply 6.3 * 6.3 that is your answer in terms of pi.

Answer 4

39.69

Answer 5

how do i know if it has a π

Answer 6

Yes, so our answer is \(36.69 \pi\)

Answer 7

@iGreen.

Answer 8

does it have a π or cm2

Answer 9

Because we never multiplied 'pi'

\(A = \pi r^2\)

The radius here is 6.3.

\(A = \pi 6.3^2\)

6.3^2 is 39.69

\(A = 39.69 \pi\)

Answer 10

Sorry I meant "Yes, so our answer is \(39.69 \pi\)"

Answer 11

oh thanks

Answer 12

Np