Question

The formula for the circumference of a circle is C = 2r, where r is the radius and C is the circumference. The equation solved for r is r = .
Find the radius of a circle that has a circumference of 16.

Answer 1

thats the wrong formula for circumference

Answer 2

\[C=2\pi r\]

Answer 3

circumference is C=2πr

Answer 4

2(pi)r

Answer 5

So if you are solving for r, then \[r = \frac{C}{2\pi}\]

Answer 6

\[C = 16 ~,~ r = \frac{C}{2\pi} \implies r = ~?\]