Question

The circumference of a circle measures 11.27xpie ft. What is the measure of the diameter of this circle?

Answer 1

The circumference of a circle can be defined as
\[\large C= 2 \pi r \]
Since they gave you the circumference of 11.27 pi, just plug it in and solve:
\[\large 11.27 \pi = 2\pi r\]
Divide by 2 pi
\[\frac{11.27\pi}{2\pi}= r \]
The pi's can cancel, leaving
\[\large \frac{11.27}{2} = r \]

Since radius is just HALF the diameter, you could multiple by 2
\[\large 11.27 = 2r=D\]

Answer 2

okay!