4024/11 Oct/Nov 2024, Question 25: Trigonometry in 3D: Cuboids
Cambridge O Level Mathematics 4024 · Paper 11 (Non-calculator) · Non-calculator · 3 marks
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The question, in short
A cuboid has EH = 6 cm, HG = 2 cm and space diagonal EC = 7 cm; calculate the length CG.
Summarised in our own words. Use the official paper for the exact wording and the diagram.
Solution · 3 marks
- 1EC² = EH² + HG² + CG²
- 2CG² = 7² − 6² − 2² = 49 − 36 − 4 = 9
- 3CG = 3 cm
Answer3
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