Mathematics 0580 · IGCSE · Angles

Angles — practice question

The sketch shows an isosceles triangle set between two parallel lines. The apex angle is 40^{\circ}. The angles x^{\circ} and y^{\circ} are marked.
(a)[2]

Work out the value of x.

(b)[2]

Work out the value of y. State a geometric reason for your answer.

Worked solution & mark scheme

This 4-mark question has a full step-by-step worked solution and mark scheme. One marking point: “\(\frac{180-40}{2}\)” …

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