In a right-angled triangle the hypotenuse is 13 cm and one leg is 5 cm. How long is the other leg?
Answer and explanation
Correct answer: C. 12 cm
- Step 1: The unknown leg squared equals 13 squared - 5 squared = 169 - 25 = 144. Step 2. Square root of 144 is 12. Answer: 12 cm. Why not the others: 8 cm subtracts lengths instead of squares; 18 cm adds the sides; 144 is the square of the answer, not the length.
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