Calculating Rectangular Plots
measurement · area of composite rectangles
Find at least two different ways to find the area of a composite rectilinear figure.
Calculating Rectangular Plots is a Grade 3 area task that asks pairs to find the area of composite rectilinear figures in more than one way. Students can decompose a shape into smaller rectangles or enclose it in a larger rectangle and subtract the missing part. The emphasis is not just on getting an area, but on comparing valid strategies for the same figure.
Use this as partner problem solving when students already know how to find the area of rectangles and squares. Resist showing the decomposition immediately; the value comes from students testing possible partitions and explaining why their method works. A free Find a Math Game account lets you generate teacher-ready lesson support for Calculating Rectangular Plots. Free accounts include 3 lifetime generations with no credit card.
- Grades:
- 3
- Players:
- 2 players
- Classroom use:
- partner work
Standards alignment
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