What is the circumference of a circle when the diameter is 18?

2 Answers
Apr 1, 2018

The answer is #56.57#.

Explanation:

In the process,

Diameter= 18,

Radius(r)= #(18)/2#

#:.# Radius= 9

Now,

Circumference (Perimeter) = ?

According to the formula,
Perimeter= 2# xx (22)/7 xx r#

Taking the equation,
Perimeter= 2# xx (22)/7 xx r#

#rArr##2 xx (22)/7 xx 9#

#rArr# #(396)/7#

#rArr# #56.57142857#

#rArr# #56.57#

Let's hope this helps you:)

Apr 1, 2018

#18pi~~56.55" to 2 dec. places"#

Explanation:

#"calculate the circumference (C) using the formula"#

#•color(white)(x)C=pidlarrcolor(blue)"d is the diameter"#

#"here "d=18#

#rArrC=18pi~~56.55" to 2 dec. places"#