Question

How do you find the area of a circle if the diameter is 9?

Answer 1

=63.585

Explanation:

A = π r²

9/2=4.5

4.5^2=20.25

20.25x3.14=63.585

Answer 2

A≈63.62

Explanation:

A=πr2

d=2r

Solving forA

A=1 /4 x π x d^2

=1 /4 x π x 92 ≈ 63.61725