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Geometry 73 Exterior Angles.notebook Exterior Angles • Students will review the different type of angles. • Students will calculate the exterior angles. Geometry Butterflies, Pinwheels and Wallpaper 1. If <8 = 49 , determine the measures of the other seven angles. o TEKs 8.8A Write onevariable equations or inequalities with variables on both sides that represent problems using rational number coefficients and constants 8.8C Model and solve onevariable equations with variables on both sides of the equal sign that represent mathematical and realworld problems using rational number coefficients and constants 2. Find the value of the missing angle x. x 8.8D Use informal arguments to establish facts about the angle sum and exterior angle of triangles, the angles created when parallel lines are cut by a transversal, and the angleangle criterion for similarity of triangle 35o answers 3. Find the value of x. xo xo Lines C and D are cut by transversal t. Which of the following is true? m<1 = m<6 m<8 = m<2 Title Page Math Humor ANSWERS (x 12)o 2. 55o 3. x = 64 4. C m<4 = m<7 m<3 = m<2 Warm Up Cut and tape Labsheet in your journal 3.0 Congruent or Supplementary? 7 Pull 1 2 3 4 5 6 8 What is the measure of the exterior angle TUG? Math Humor Labsheet Build an igloo... build a sand castle? Find a friend and tell them what an exterior angle is. Friend Transition Would You Rather? 1 Geometry 73 Exterior Angles.notebook ______ Date Exterior Angles 1. What are • interior inside the shape interior and exterior angles? • exterior outside the shape 2. How to find • the sum of the interior and the measure of exterior angle equals 180o the exterior • any exterior angle equals angle? the sum of the two interior angles across 180o Notes Activity Exterior Angle Maze Notes Closing Questions Which angles are next to one another? (adjacent) How do you calculate the exterior angles? (subtract from 180) Activity Closing Questions 2