Transition Radius of a Ramp

The diameter of a circle is the distance across the middle.

The radius of a circle is half of the diameter, or the distance from the center of the circle to its border.

To make the transition side piece for a ramp, start with a rectangular piece of plywood and follow the edge of part of a circle. The radius of this circle is known as the transition radius of the ramp.

The equation of a circle that is centered at the origin ( 0, 0 ) and has a radius of r is given by:

More to come...