How many linear feet in a 3 foot diameter circle?

Answer 1

Arch length, or linear distance of an arch, is equal to:

(Angle of Arch in Radians) x (Radius of Arch)

So for a complete circle (Arch angle of 360 Degrees) with a diameter of 3 feet (or radius of 1.5 feet) the linear circumference would be:

(2 x PI) x (radius) = (2 x PI) x (1.5 ft), where PI = 3.14 radians and represents 1/2 of a complete circle.

This is also the equation for a circle's circumference.