Question P3 Angle and shape properties
Is the shown 120° angle smaller or larger than a right angle?
Answer
larger than a right angle
Mark the shape property first, then subtract known angles from the relevant total.
In this one. A right angle provides a ninety-degree benchmark for comparing turns.
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.
Worked examples of all 33 patterns and skills, in a booklet you can print.