0580/43 May/Jun 2026, Question 17: Trigonometry in 3D: Cuboids
Cambridge IGCSE Mathematics 0580 · Paper 43 (Extended) · Calculator · 3 marks
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The question, in short
A cuboid has AB = 18 cm, BC = 14 cm and AE = 16 cm. Work out the length of the space diagonal AG.
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Solution · 3 marks
- 1AG² = 18² + 14² + 16²
- 2= 324 + 196 + 256 = 776
- 3AG = √776 = 27.9 cm
Answer27.9 or 27.85 to 27.86
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