Question

A lid on a circular container has a diameter of 9 cm. What is the approximate area of the lid? Use 3.14 to approximate pi and round your answer to the nearest hundredth.

_______ cm2

Answer 1

Hi there, A=1/4πd²=1/4*π*9²=63.61725cm², that would round to 63.62cm². Therefore, the answer would be 63.62 cm²

Answer 2

area=pir^2

diameter/2=radius
diameter=9
d/2=9/2=4.5=r

area=pi4.5^2
area=pi20.25
aproxpi=3.14
area=63.585
round hundreth
area=63.59

answer is 63.59cm^2