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This document from math 102, spring 2007, covers various angle-related problems and exercises. Students are asked to determine the size of different angles using a protractor, find complementary, supplementary, and vertical angles, and explore the relationship between perpendicular lines through folding. Dr. Howald's handout also includes examples of acute, obtuse, and right angles.
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Math 102 Handout # 3 Spring 2007
Math 102 Handout # 3 Spring 2007
Fold any part of the crease you made onto itself, and crease the new line that is formed. Unfold the paper to see the two creased lines. a. Use your Protractor to measure the angle made by the two creases. b. Explain why two lines formed this way must be perpendicular. c. Try to use folding to create angles of 45, 135, and 2230’. Explain the folding steps for each.