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If 7, 24 and c are sides of a right triangle with c the hypotenuse, c equals
A26
B23
C25
D31
Answer & Solution
Correct answer: C. 25
1. Apply a^2 + b^2 = c^2 with a = 7, b = 24.
2. c^2 = 49 + 576 = 625.
3. c = sqrt(625) = 25.
4. So the hypotenuse is 25.
_Source: Selina Concise Mathematics Class 9, Ch on Pythagoras Theorem (Mistral OCR'd PDF), section on triples_
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