Circle P has a radius of 7 and Circle R has a diameter of 8. The circumference of Circle P is how much greater than the circumference of Circle R?

Question

anonymous · Answer

Well let's find the circumferences!

C = 2pi*r.

C_p = 2pi*7 = 14pi.
C_r = 2pi*(8/2) = 8pi.

Notice how for C_r I divided 8/2 because we were given that the diameter is 8. The circumference formula, however, uses the radius.

So, C_p - C_r = 14pi - 8pi = 6pi.

Circle P's circumference is 6pi units greater than the circumference of Circle R.

anonymous · Answer

I get it!!!!!! Thank You!!!!!!!!!!!!

anonymous · Answer

My pleasure!