alleryStart learning →A triangle has sides 7 cm, 8 cm and 10 cm. Is it right-angled?
AYes, as 7 + 8 is more than 10
BNo, as 49 + 64 is not 100
CYes, as 8 + 10 is more than 7
DNo, as it cannot be a triangle
Answer & Solution
Correct answer: B. No, as 49 + 64 is not 100
The sum of the squares of the two shorter sides is 113, which does not equal 100, so no right angle is formed.
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