Nanyang 2025 P6 Maths Prelim — Paper 2 Q5 Solution

Paper 2 · Q5 · 2 marks · Angles

Question

A piece of paper in the shape of a parallelogram was folded along the dotted line GH as shown. Find $\angle a$.

Answer: $35^\circ$

Before folding, the angle at G between the side and the fold line is $46^\circ$ and the angle on the other side of G is $123^\circ$. When the paper is folded along GH, the folded angle is reflected. Working with the angles around H after folding, $\angle a = 35^\circ$.

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