This post about is the the Angle tangent properties. Formulas for the radius of a circle, the diameter of a circle, the circumference (perimeter) of a circle. Therefore It also include the length of chord of a circle. Because of length of chord angles also varies. Similarly other properties also involve.
Explore, prove, and apply important properties of circles that have to do with things like arc length, radians, inscribed angles, and tangents.
Angle Properties