Question

The equation of two equal sides of an isosceles triangle are 7x - y + 3 = 0 and x + y - 3 = 0 and its third side is passes through the point (1, -10). The equation of the third side is

(a) x - 3y - 31 = 0 but not 3x + y + 7 = 0

(b) Neither 3x + y + 7 = 0 nor x - 3y - 31 = 0

(c) 3x + y + 7 = 0 or x - 3y - 31 = 0

(d) 3x + y + 7 = 0 but not x - 3y - 31 = 0

Answer 1

Correct option (c) 3x + y + 7 = 0 or x - 3y - 31 = 0

Explanation:

Let slope of the 3^rd side = m