Question

What the hell is this they didn’t teach me this help me

Answer 1

Explanation:

`A=\pi r^2,\ r=(d)/(2)\\ \\ A=(\pi d^2)/(4),\ d=8cm\\ \\ A=(64\pi)/(4)\\ \\ A=16\pi cm^2`

Answer 2

C

Explanation:

Area = π
`r^(2)`

r means radius

radius = d/2

d = diameter

8 /2 = 4

4 is radius

`4^(2)` = 16

^ ( its 4 x 4 ) ^

so then,

Area = 16π