Question

The diameter of a circle is 5 centimeters.

What is the circle's circumference? Use a = 3.14
Answer:
centimeters.

Answer 1

15.7

Explanation:

circumference = 2 x 3.14 x r ---? 2 x 3.14 x 2.5 = 15.7

Answer 2

half of 5 is 2.5

2.5 x 3.14 x 2 = 15.7 cm

Formula of circumference:

2(you just always need this number when finding circumference) x pi(3.14 or 22/7 depending on what they tell you to use) x r(radius, half of your diameter or given radius).