alleryIs a triangle right-angled? I: Sides are 5, 12, 13. II: Perimeter is 30.
ANeither, even together
BI alone suffices
CII alone suffices
DBoth together needed
Answer & Solution
Correct answer: B. I alone suffices
Since 5 squared plus 12 squared equals 13 squared, the sides alone prove a right angle.
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