Geometry Circle Review Guide 10.1 – Circumference and Parts of Circles Labeling Parts of a Circle Definition of a Radius Definition of a Diameter Definition of Circumference 10.2 – Arcs and Arc Lengths Relationship between Central Angle to Arc Measure Relationship between Arc Length to Circumference Definition of Major and Minor Arc Definition of Semicircle 10.3 – Chords and Arc Lengths Relationship between chords and arc length Relationship between distance from equal chords Chords being cut Recognizing what you know 10.4 – Inscribed Angles Definition of Inscribed Angle Two Inscribed Angles Inscribed Semicircle Inscribed Quadrilateral Parallel Arcs