Chapter 3 Lesson 3 Objective: To use exterior angles of triangles.

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Presentation transcript:

Chapter 3 Lesson 3 Objective: To use exterior angles of triangles.

Exterior angles of a polygon: Exterior angles of a polygon: an angle formed by a side and an extension of an adjacent side. 1Exterior Angle

Remote Interior angles: Remote Interior angles: for each exterior angle of a triangle, the two nonadjacent interior angles. 12 Remote Interior Angles

The measure of each exterior angle of a triangle equals the sum of the measures of it two remote interior angles. Theorem 3-8: Triangle Exterior Angle Theorem 1Exterior Angle 32 Remote Interior Angles

Example 1: Find each missing angle measure. 40° 30° 1

Example 2: Find each missing angle measure. 113° 70° 2

Example 3: 125° 1

Example 4: Find 45° 3

Assignment Pages #24-30; 34-36; Bring your WORKBOOKS Monday!