The circumference of the bike tire above is 84.78 inches. what is the radius of the bike tire? use = 3.14.

Circumference = 2 x Radius x Pi C = 2 * r * π, where: r = radius and π = 3.14 1) All you have to do is substitute in order to find the radius (r) of the bike tire, C = 2πr 82.896 = 2 * 3.14 * r 82.896 = 6.28 * r r = 82.896 / 6.28 r = 13.2. Thus, r = 13.2 which means that the radius of the circle (bike tire) is 13.2 inches