PQR is a right angled triangle in which PQ = QR. If the hypotenuse of the triangle is 20 cm, then what is the area (in cm2) of the triangle PQR?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 100
In △PQR
let PQ = QR = x
x2 + x2 = 202
x = 10√2 cm
Hence,
Area of △PQR = 1/2 × 10√2 × 10√2 = 100 cm2