Lesson plan

Classify conditions of triangle constructions based on the number of triangles that can be created

teaches Common Core State Standards CCSS.Math.Content.7.G.A.2 http://corestandards.org/Math/Content/7/G/A/2
teaches Common Core State Standards CCSS.Math.Practice.MP2 http://corestandards.org/Math/Practice/MP2
teaches Common Core State Standards CCSS.Math.Practice.MP7 http://corestandards.org/Math/Practice/MP7

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Big Ideas: The number of triangles formed from specific given from conditions can often be determined before constructing triangles. Patterns exist in the kinds of measurements given to create a triangle. Students will be using their prior knowledge of triangle construction to categorize conditional measurements for constructing triangles. Students will be looking for patterns and practice creating triangles. These patterns will help students rationalize about how many triangles can be created based on conditions given. Vocabulary: Triangle Inequality Theorem, obtuse, right, actue, isosceles, equilateral, and scalene triangles Special Materials: Rulers, protractors, compasses, printed and cut-out cards from Resource Section