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If the hypotenuse is 25 cm and one leg is 7 cm, the other leg is
A20 cm
B18 cm
C24 cm
D12 cm
Answer & Solution
Correct answer: C. 24 cm
1. Use b^2 = c^2 - a^2.
2. b^2 = 25^2 - 7^2 = 625 - 49 = 576.
3. b = sqrt(576) = 24.
4. So the other leg is 24 cm.
_Source: Selina Concise Mathematics Class 9, Ch on Pythagoras Theorem (Mistral OCR'd PDF), section on word problems_
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