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Scaffolded and standards-based, this 3.MD.C.7.d product will help build understanding of how to determine the area for rectangular figures (irregular figures). There are worksheets, concept development pages, exit tickets, homework, a checklist and an assessment. Students are first asked to decompose figures. Then, students are asked to determine area of figures with given decomposed areas. Finally students will have decompose rectangular figures, determine the area of the rectangles within the figure, and add the area together to get a total.