What is the diameter of a circle with circumference 5?

1 Answer
Jun 26, 2018

Answer:

#D = 1.6#

Explanation:

Using;

#C = 2pir#

Where;

#C = "Circumference"#

#r = "Radius"#

Recall;

#D = 2r#

#D = "Diameter"#

Therefore;

#r = D/2#

Substituting #r# into the main equation..

#C = 2pi(D/2)#

#C = cancel2pi(D/cancel2)#

#C = piD#

Making #D# the subject;

#C/D = (piD)/D#

#C/pi = (cancelpiD)/cancelpi#

#D = C/pi#

When;

#C = 5#

#pi = 22/7#

#D = 5/(22/7)#

#D = 5 div 22/7#

#D = 5 xx 7/22#

#D = 35/22#

#D = 1.59090#

#D = 1.6#