[Free Registration/Login may be required to access all resource tools.] Apply inscribed angle theorems.

Use theorems to prove inscribed angles in circles.

Explains the basic concept of arcs, angles, and sectors with step-by-step instructions and methods for solving specific problems on your own relating to this topic.

Dr. Math gives a student a hint on how to prove that an inscribed angle is equal to 1/2 the central angle. You should know what the central angle and inscribed angle are to utilize this site.

Use theorems to prove ideas of inscribed and central angles in circles.

The geometry tutorial investigates the definitions and theorems related to inscribed and central angles in circles. An example with a detailed solution is included.

[Free Registration/Login may be required to access all resource tools.] Solve problems containing angles on or inside a circle.

Determine the missing angle measures of quadrilaterals inscribed in circles.

A short interactive activity to prove that a triangle inscribed in a semicircle is right-angled.