Vocabulary of angles created by segments in a circle

1. Unit 10 Day 2 Objective: Explore the relationships between arcs and central angles in a circle.

2. Daily Quiz When finished, get out your Circles tool kit.

3. Vocabulary Central Angle: Has a vertex at the center of the circle. Arc: Part of the circle O A B C

4. Vocabulary Arc Length vs. Arc Measure Arc Measure is measured in degrees and is a fraction of the 360° of a circle. Arc Length is how far it is from one point to another as we travel along the circle O A B C

5. Vocabulary Minor Arc: Arc measure that is < 180° ( ) Major Arc: Arc measure that is > 180° ( ) O A B C

6. Vocabulary Concentric Circles: Circles that share the same center.