Compose and decompose 2D shapes, and show that area remains constant when rearranged
10 tutor-authored questions for this Ontario curriculum expectation, ordered easiest to hardest — every one with a full worked solution. Work through them free, no account needed.
Sample: the first question, solved
If you cut a rectangle in half along a line connecting the midpoints of its two longer sides, what two shapes do you get?
📘 Worked solution
✓Two smaller rectangles — the cut runs parallel to the shorter sides, splitting the rectangle into two matching rectangular halves.
And one from the hard end
A regular pentagon is decomposed into triangles by cutting from its center to each vertex. How many triangles result?
Solution shown after you try it in practice mode.
Work through all 10, easiest to hardest
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