Lesson plan

Solve missing side problems using the formula for perimeter

teaches Common Core State Standards CCSS.Math.Content.4.MD.A.3 http://corestandards.org/Math/Content/4/MD/A/3
teaches Common Core State Standards CCSS.Math.Practice.MP8 http://corestandards.org/Math/Practice/MP8

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Big Ideas: The formula for perimeter can be used to solve missing side problems. This lesson builds off previous experiences working with the formula for perimeter of rectangles. Students deepen their understanding of the formula and the relationship between the dimensions of a rectangle and its perimeter by applying the formula for perimeter in missing side problems. Vocabulary: perimeter, dimensions, length, width, formula Special Materials: grid paper (optional)