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Lesson Plan

Write and solve equations for unknown angles using properties of angles

teaches Common Core State Standards CCSS.Math.Content.7.G.B.5 http://corestandards.org/Math/Content/7/G/B/5
teaches Common Core State Standards CCSS.Math.Practice.MP7 http://corestandards.org/Math/Practice/MP7
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Big Ideas: Complementary, supplementary, vertical, and adjacent angles can be used to find the measures of unknown angles. Complementary, supplementary, vertical, and adjacent angles can be used to write and solve equations for unknown angles. This lesson builds on students’ previous work with decomposing angles and recognizing that angles measurements are additive. The task requires students to use their knowledge of complementary, supplementary, vertical, and adjacent angles to solve equations for unknown angles in a game. The mathematical concepts in the lesson build toward student understanding of rotations, reflections, and translations. Vocabulary: supplementary angles, complementary angles, vertical angles, adjacent angles, vertex Special Materials: pencil
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