0580/41 Oct/Nov 2025, Question 3: Angles in Parallel Lines
Cambridge IGCSE Mathematics 0580 · Paper 41 (Extended) · Calculator · 2 marks
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The question, in short
Two parallel lines are crossed by a straight line, with angle x° at the upper intersection and 55° at the lower intersection. Find x.
Summarised in our own words. Use the official paper for the exact wording and the diagram.
Solution · 2 marks
- 1The angle matching 55° at the upper intersection is 55° (parallel lines)
- 2x = 180 − 55 = 125 (angles on a straight line)
Answer125
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