Question

A small pizza has a diameter of 21 cm. What is the approximate circumference of the pizza? Use π= 3.14.

Answer 1

The formula for circumference of a circle is πd. Substitute the diameter and the rounded value of π in so you have 21*3.14.

Multiply to get 65.94 cm, which is the approximate circumference of the pizza.

Answer 2

Circumference=πd
=3.14x21
=65.94cm²