0580/11 Oct/Nov 2022, Question 8: Angles in Parallel Lines
Cambridge IGCSE Mathematics 0580 · Paper 11 (Core) · Calculator · 2 marks
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The question, in short
Two straight lines cross two parallel lines, meeting on the upper parallel line; angles x° and 71° are above it and 55° is at the lower line. Find x.
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Solution · 2 marks
- 1Because the lines are parallel, the 55° angle also appears at the meeting point on the upper line, next to x° and 71°
- 2x = 180 − 71 − 55 = 54 (angles on a straight line)
Answer54
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