4024/22 May/Jun 2025, Question 4: Angles in Parallel Lines
Cambridge O Level Mathematics 4024 · Paper 22 (Calculator) · Calculator · 2 marks
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The question, in short
Using a diagram of three parallel horizontal lines crossed by two parallel slanted lines, with angles y°, 128° and x° marked, find the values of x and y.
Summarised in our own words. Use the official paper for the exact wording and the diagram.
Solution · 2 marks
- 1y = 128 (corresponding angles, using both pairs of parallel lines)
- 2128° and x° are co-interior angles between the middle and bottom parallel lines
- 3x = 180 − 128 = 52
- 4x = 52, y = 128
Answerx = 52, y = 128
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