Central and inscribed angles

What you'll learn

1. Identify central angles and determine that a central angle equals the measure of its intercepted arc
2. Apply the inscribed angle theorem: an inscribed angle equals half the measure of its intercepted arc
3. Use the corollary that inscribed angles subtending the same arc are congruent
4. Recognize and apply the theorem that an inscribed angle in a semicircle (subtending a diameter) is 90 degrees

Prerequisites

• Arc length and sector area