Quiz 10-1: Intro to Circles, Central Angles & Arcs, Arc Lengths Use the circle below for questions 1 - 7. P 2 R T 1. Name a diameter. 2. Name a radius. 3. Name a central angle. 1. 2. 3. 4. 4 Name a chord that is not a diameter. 5. S S 5. Name a minor arc. 6. 6. Name a major arc. 7. 7. Name a semicircle.