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Grade 3 Math Β· World 9: Polygon Plaza Β· Level 81
Compare and Sort Polygons
Sort polygons by their properties.
Warm-up, learn, try it together, practice, then a quick check. About 15 minutes.
What children learn in Level 81
- A square has 4 right angles, so it is a rectangle too! It's a special rectangle with all 4 sides the same length.
- A square has 4 sides the same length, so it is also a rhombus. But not every rhombus is a square: most have no right angles.
- Every parallelogram has 2 pairs of parallel sides. A trapezoid needs at least 1 pair, so every parallelogram is a trapezoid too!
- To sort shapes, ask a question about every one: does it have a right angle? Parallel sides? 4 equal sides?
Georgia's K-12 Mathematics Standards:
- 3.GSR.6.2 β Classify, compare, and contrast polygons, with a focus on quadrilaterals, based on properties. Analyze specific 3-dimensional figures to identify and describe quadrilaterals as faces of these figures.