11-4 Exterior Angles of Triangles

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Presentation transcript:

11-4 Exterior Angles of Triangles 10/4/17

Essential Question: What is the relationship between the exterior and interior angles of a triangle?

Vocabulary If you were to extend one side of a triangle, an exterior angle of a triangle is formed. In each picture, Angle 1 is an exterior angle of each triangle.

Vocabulary For each exterior angle of a triangle, the two interior angles on the opposite side are its remote interior angles.

Vocabulary The measure of an exterior angle of a triangle equals the sum of the measures of its two remote interior angles.

Example 1 (spiral/handout)

Student Companion p. 270 Part 1 Got it

Example 2 (spiral/handout)

Student Companion p. 270 Part 2 Got it

Example 3 (spiral/handout)

Student Companion p. 271 Part 3 Got it

Student Companion p. 272 Focus Question #1-4 and #6 Homework Student Companion p. 272 Focus Question #1-4 and #6