Inscribed Angles

An inscribed angle, is an angle inside a circle and is formed when two chords intersect on the circle. The relationship is that an inscribed angle is equal to half the length of the arc (outside part of the circle) that is directly across from the angle

Enter in a value for the inscribed angle(blue) or arc(red) of your circle, and this program will calculate the missing value

Angles Outside of a Circle

Outisde angles are formed by the intersection of two chords, which is located outside of the circle. The relationship here is that the outside angle is equal to half of the difference of the inner and outer arcs of the circle that lie between the two chords

Enter in two values below and this program will calculate the missing value