Objective: To identify complementary, supplementary,

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Presentation transcript:

Objective: To identify complementary, supplementary, alternate interior, corresponding, and vertical angles. 4.12.6 Class Notes Geometry Sec 2.3 1. Complementary Angles: 2 angles that add up to 90 20 Are these two angles adjacent or non-adjacent? 20 70 15 A B C D Example 1: Find the measure of a. ABD b. ABC c. DBC

3. Supplementary Angles: 2 angles that add up to 180 Are these two angles adjacent or non-adjacent? Are these two angles adjacent or non-adjacent? 20 20 160 4. Example 2: Find the measure of ACB ACD c. DCB 13 A B C D

5. Find the measure of all the unknown angles. 37 A B C D E F 128 G H 6. Find x 7. Find the measure of the acute angle. 4x-52 2x-4 8. Find the measure of the obtuse angle.

9. Find x 3x + 7 2x + 18 10. Find the measure of the acute angle. 11. Find the measure of the obtuse angle.