Question

What is the area of a circle if the diameter is 9cm?
Round to the nearest hundredth (0.01cm2)

Answer 1

To find the area of a circle we have
`\pir^(2)` and the radius is half of the diameter so we have 4.5² which gives 16.25π

Answer 2

Answer: A≈63.62

Explanation:

9/2= 4.5

A=πr2=π·4.52≈63.61725