Question

The circumference of a circle is 8π cm. What is the circle's area? 32 π cm 2 16 π cm 2 8 π cm 2 64 π cm 2

Answer 1

The answer is B 16

Step-by-step

Answer 2

16
`\pi`

Explanation:

we know that the formula for finding area of circle is A=
`\pi`r^2. and circumference of circle can be calculated by c=2
`\pi`r.

first we need find radius from circumference formula and put in area formula to get the desired result.

for radius, r=c/2
`\pi` =8
`\pi`/2
`\pi` we get 4. now put in area formula as shown above.

we get , A=
`\pi`*(4)^2 =
`\pi`*4*4 =16
`\pi`