Question P5 Angle and shape properties
One angle of a rhombus is 84°. Find the opposite angle.
Answer
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Mark the shape property first, then subtract known angles from the relevant total.
In this one. Equal sides identify a rhombus, while its parallelogram structure makes opposite angles equal.
Look for a named quadrilateral like a rhombus or parallelogram, plus two straight lines crossing inside or through it. Words like "straight line" and "collinear" point to this move.
Children mix up which angle sits opposite which once lines cross at a point away from the main shape. Trace each ray back to its two labelled ends before deciding what faces what.
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