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Grade 5 Math · World 9: Polygon Palace · Level 92
All, Some, or None
Test statements about shape groups, with no hierarchy to memorize.
Warm-up, learn, try it together, practice, then a quick check. About 15 minutes.
What children learn in Level 92
- To test a statement about shapes, look for one example that breaks it. All squares are rectangles? Every square has four right angles, so yes.
- All rectangles are squares? No! A long rectangle's sides aren't all equal. One example is enough. But some rectangles are squares.
- No means none at all. No triangle is a quadrilateral, because 3 sides aren't 4.
- You've reached the top of Polygon Palace. There's no chart to memorize. You can reason it out from what each shape must have.
Georgia's K-12 Mathematics Standards:
- 5.GSR.8.2 — Determine, through exploration and investigation, that attributes belonging to a category of two-dimensional figures also belong to all subcategories of that category.