Mensurationmedium · Past Paper
The area of an isosceles right-angled triangle whose hypotenuse is 10 cm is:
A25 sq. cm
B50 sq. cm
C100 sq. cm
D12.5 sq. cm
✓ Correct Answer: A — 25 sq. cm
Let sides be x. x^2 + x^2 = 100 => 2x^2 = 100 => x^2 = 50. Area = 0.5 * x^2 = 25 sq. cm.
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