Question

A small silver dollar pancake served at a restaurant has a circumference of 2 inches. A regular pancake has a circumference of 4 inches. Is the area of the regular pancake twice the area of the silver dollar pancake? Explain.

Answer 1

C=(2)(pi)(radius)
A=(pi)(radius)^2

Area of small silver dollar pancake=4pi
Area of regular pancake=16pi
16pi/4pi=4 times bigger than silver dollar pancake
NO, because in order to find the area of a circle you need to multiply pi with radius squared.