rectangle properties
State two properties shown by the rectangle.
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The pattern behind it: Seeing it move
Work out where the pieces land after a fold, cut or stack.
In this one. Marks on a diagram state exact properties; appearance alone does not prove equality or a right angle.
How to spot it
Words like 'folded', 'cut along the dotted line' or 'stacked' appear beside a shape, and the question asks for a length or angle that only makes sense once the pieces are in their new positions.
Common mistake
Children try to calculate the answer before working out where the pieces actually end up, skipping the visualisation step that the whole question depends on.
Try one like it
Standard complete a symmetric figure Complete the shown half-figure by reflecting it across the dashed line.The 33 problem patterns
All 33 patterns, one to a page — the 19 behind Primary 5 and 6 word problems, and the skills the younger years are built on. The bar model, how to spot it in the question, and the mistake children make. A booklet you can print. Free.
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