Question

Let PQR be a right angled isosceles triangle, right angled at P (2,1). If the equation of the line QR is 2x + y = 3, then the equation representing the pair of lines PQ and PR is

Answer 1

Correct option: (b)

Explanation:

Let * be the mid point of QR and given Δ PQR is an isosceles.

Therefore, PS ⊥ QR and is mid point of hypotenuse, therefore, is equidistant from P, Q, R.

. .. PS = QS = RS

.'. Equation of PQ and PR are