Circles have different angle properties, described by theoremA mathematical statement that can be demonstrated to be true.. There are seven circle theorems.
An important word that is used in circle theorems is subtendAn angle created by an object at a given point..
Subtending
An angle is created by two chordA straight line joining two points on a circle is a chord..
The angle in between the two chords is subtended by the arcThe curve between two points on the circumference of a circle. between C and D.