1. Triangle Relationships
Chapter 4
Triangle Relationships

2. Section 2 Angle Measures of Triangles

5. Example 1: Find an Angle Measure Given m<1 = 43° and m<B = 85°, find m<C.

7. Example 2: Find Angle Measures
∆ABC and ∆ABD are right triangles. Suppose m<ABD = 35°.
Find m<DAB.
Find m<BCD.

8. Checkpoint: Find an Angle Measure

9. When the sides of a triangle are extended, other angles are formed
When the sides of a triangle are extended, other angles are formed. The three original angles are the _________________________________________. The angles that are adjacent to the interior angles are the _________________________________________. It is common to only show one exterior angle at each vertex.

11. Example 3: Find an Angle Measure Given m<A = 58° and m<C = 72°, find m<1.

12. Checkpoint: Find an Angle Measure

13. EXIT SLIP