Radius of a Circle

Written by Jerry Ratzlaff on . Posted in Plane Geometry

Radius of a Circlecircle2

Radius of a Circle formula

\(r = \frac {D} {2} \)

\(r = \frac {C} {2 \pi} \)

\(r = \sqrt   {\frac {A} {\pi} }\)

Where:

\(r\) = radius

\(d\) = diameter

\(C\) = circumference

\(A\) = area