What is the diameter of a circle whose circumference is 5?

2 Answers
Mar 23, 2018

"diameter "=5/pi~~1.59" to 2 dec. places"diameter =5π1.59 to 2 dec. places

Explanation:

"the circumference (C) of a circle is"the circumference (C) of a circle is

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

"here "C=5here C=5

rArrpid=5πd=5

"divide both sides by "pidivide both sides by π

(cancel(pi) d)/cancel(pi)=5/pi

rArrd=5/pi~~1.59" to 2 dec. places"

Mar 23, 2018

The diameter is 35/22.

Explanation:

The diameter of a circle is twice its radius.

We can find the radius of the circle by the equation

"circumference" =2pir

Now, just plug it in as 5 = 2pir

5=2*(22/7)r

r = 5*(1/2)*(7/22)

r = 35/44

Since the diameter is twice the radius, d = 35/44 * 2

d=35/22