Question

Help need this asap!

Answer 1

C = 16πcm

A = 64π cm^2

Explanation:

So our given r is 8cm and we calculate circumfrunce as

`c = 2\pi \: r = \pi \: d`

And for area as

`a = \pi \: {r}^(2) = \pi \: { (d)/(4) }^(2)`

so

C= 2πr

C = 2 ( 8cm ) π

C = 16πcm

And

A = πr^2

A = π(8cm)^2

A = 64π cm^2