Question

A circle has a diameter of 4 meters. What is its perimeter (to the nearest hundredth)? What is its area (to the nearest hundredth)

Answer 1

perimeter=22\7 x 412.57m
area=22\7 x 2 x 2=12.57 square meters

Answer 2

Perimeter is Circumference of a circle.
C=pi(or 3.14) times diameter
C=3.14(4)
C=12.56 meters

Then area is pi (3.14) times radius squared
A=3.14(4/2)^2
A=3.14(2^2)
A=3.14(4)
A=12.56 meters squared