A rectangle has diagonal 13 and one side 5. The other side has length:
A7
B8
C12
D18
Answer & Solution
Correct answer: C. 12
By Pythagoras on the right triangle formed by sides and diagonal: 5² + b² = 13² → 25 + b² = 169 → b² = 144 → b = 12. (5-12-13 Pythagorean triple.)
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