How do you find the circumference of a circle with a diameter of 3 inches?

1 Answer
Jun 3, 2018

Answer:

#3pi# inches or about #9.42# inches(rounded to nearest hundredth's place)

Explanation:

The formula for the circumference of a circle is #2pir# where #r# is the radius, or #pid# where #d# is the diameter.

In this problem, we are given the diameter, so we can use the #pid# formula to find the circumference. Plug in #3# for the diameter:
#pi(3) = 3pi# inches

If you want to simplify this even further, we know that #pi ~~ 3.14#, so #3(3.14) = 9.42# inches(rounded to nearest hundredth's place)

Hope this helps!