4MA1/1F Nov 2021, Question 14: Pythagoras' Theorem
Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 1F (Foundation) · Calculator · 3 marks
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The question, in short
A right-angled triangle has legs 30 cm and h cm and hypotenuse 52 cm; calculate h, giving the answer to 3 significant figures.
Summarised in our own words. Use the official paper for the exact wording and the diagram.
Solution · 3 marks
- 1The 52 cm side is the hypotenuse
- 2h² = 52² − 30² = 2704 − 900 = 1804
- 3h = √1804 = 42.47…
- 4h = 42.5 (3 s.f.)
Answer42.5
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