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# CPM Geometry Unit 10 Day 2

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Vocabulary of angles created by segments in a circle

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### CPM Geometry Unit 10 Day 2

1. 1. Unit 10 Day 2 Objective: Explore the relationships between arcs and central angles in a circle.
2. 2. Daily Quiz When finished, get out your Circles tool kit.
3. 3. Vocabulary Central Angle: Has a vertex at the center of the circle. Arc: Part of the circle O A B C
4. 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. 5. Vocabulary Minor Arc: Arc measure that is < 180° ( ) Major Arc: Arc measure that is > 180° ( ) O A B C
6. 6. Vocabulary Concentric Circles: Circles that share the same center.
7. 7. Classwork <ul><li>CS 11 - 15 </li></ul>
8. 8. Closure <ul><li>Find the measure of major arc </li></ul><ul><li>if arc ED = 98°? </li></ul>