(D) Decompose composite figures formed by rectangles into non-overlapping rectangles to determine the area of the original figure using the additive property of area
3.MD.7 Relate area to the operations of multiplication and addition.3.MD.7.D
3.MD.7.D Recognize area as additive. Find areas of rectilinear figures by decomposing them into non-overlapping rectangles and adding the areas of the non-overlapping parts, applying this technique to solve real world problems.
This Common Core measurement and data lesson covers how to find the area of rectilinear shapes. The lesson includes research-based strategies and strategic questions that prepare students for Common Core assessments. In this lesson, students will split the rectilinear shape into rectangles, find the area of each rectangle, and then find the area of the rectilinear shape by adding the areas of each rectangle. In addition to the lesson, there are four pages of Independent Practice with questions modeled after the Common Core assessment items.
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