Answer:
16π cm ≈ 50.27 cm
64π cm ≈ 201.06 cm
Explanation:
Circumference formula is Diameter × π
To find diameter we just multiply the radius by 2
8x2=16
Now we fill it into the formula to find exact
16π cm
And now to find approximate we put this in a calculator to get
50.27 cm
Circle area formula is pi x radius square
First find the square of the radius or 8
8^2= 64
Now put this next to pi for exact
64π
Now put this into calculator for approximate
201.06
Hope this helps