0580/23 Oct/Nov 2025, Question 23: Area of a Triangle Using Sine
Cambridge IGCSE Mathematics 0580 · Paper 23 (Extended) · Non-calculator · 3 marks
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The question, in short
Calculate the area of triangle ABC using side lengths AB = 6 cm, BC = 10 cm and included angle ABC = 30°.
Summarised in our own words. Use the official paper for the exact wording and the diagram.
Solution · 3 marks
- 1Area = 1/2 × 6 × 10 × sin 30°
- 2sin 30° = 1/2
- 3Area = 30 × 1/2 = 15 cm²
Answer15
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