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Grade 4 Math · World 9: Angle and Shape Studio · Level 93
Classify Polygons
Sort polygons by sides, angles, and symmetry.
Warm-up, learn, try it together, practice, then a quick check. About 15 minutes.
What children learn in Level 93
- Polygons can be sorted by what they have: parallel sides, perpendicular sides, right angles, equal sides, and lines of symmetry.
- A rectangle has 2 pairs of parallel sides and 4 right angles. A trapezoid has at least 1 pair of parallel sides. This pentagon has no parallel sides at all.
- A parallelogram has 2 pairs of parallel sides but no right angles. That's how it's different from a rectangle.
Georgia's K-12 Mathematics Standards:
- 4.GSR.8.2 — Classify, compare, and contrast polygons based on lines of symmetry, the presence or absence of parallel or perpendicular line segments, or the presence or absence of angles of a specified size and based on side lengths.