Question P5 Angle and shape properties
Two angles of a triangle are 73° and 44°. Find the third angle.
Answer
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Mark the shape property first, then subtract known angles from the relevant total.
In this one. Use each interior angle once. The total is always 180°, whatever the triangle’s shape.
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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