0580/42 May/Jun 2026, Question 1: Angles in a Triangle
Cambridge IGCSE Mathematics 0580 · Paper 42 (Extended) · Calculator · 2 marks
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The question, in short
Triangle ABC is isosceles with AB = AC and angle BAC = 30°. Find the value of x, the angle at C.
Summarised in our own words. Use the official paper for the exact wording and the diagram.
Solution · 2 marks
- 1AB = AC so angle ABC = angle ACB = x
- 22x = 180 − 30 = 150
- 3x = 75
Answer75
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Also searched as: 0580/42/M/J/26 · 0580_s26_qp_42 · 0580 s26 42 · question 1.
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