Congruence breeds congruence. Pupils learn three more circle theorems dealing with congruent chords and arcs. Learners use the theorems to find the measures of chords and arcs in circles by applying previously learned concepts in the calculations. To gain mastery, they continue to practice their skills with the provided worksheets.

Concepts

chords, arcs, central angles, circles, congruence

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Instructional Ideas

• Create a flipbook to have class members record theorems and draw examples

Classroom Considerations

• Assumes knowledge of the Pythagorean Theorem and trigonometric ratios
• Fits as the second section in a five-part unit on circles

• This video is hosted on YouTube

Pros

• Uses colors to distinguish between problems worked on the same screen
• Provides an organizational structure to take notes

Cons

• None

Common Core

SL.9-10.2 SL.11-12.2 MP6 MP7 HSG-C.A.2