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.
Share this question
More from Mensuration
- A conical tent is 9 m high and the radius of its base is 12 m. What is the cost of rice required to fill the tent if 1 m³ rice costs Rs 100?
- Find the total surface area of a solid hemisphere of diameter 2r.
- If the diameter of a sphere is decreased by 25%, by what percentage does its surface area decrease?
- Find the area of a rhombus if its side is 5 and one diagonal is 6.
- A rectangle has an area of 48 sq. cm and a length of 8 cm. What is its breadth?