What is the diameter of a circle with a 6.7 cm circumference?

Question

11346 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2016-01-02T11:11:52

You use the circumference formula:

#d=2.133#

The circumference is equal to #2π*r# where #r# is the radius, which is equal to half the diameter #d#. So we have:

#6.7=2*π*r#

#r=d/2#

Substituting the 2nd equation to the 1st gives:

#6.7=2*π*d/2#

#6.7=π*d#

#d=6.7/π=2.133#