## Question

### Solution

Correct option is

2

The givens lines are:

y = x – 1, y = –x – 1

and  y = x + 1, y = –x + 1

according as x > 0 or x < 0

Above represent two sets of parallel lines which are perpendicular which enclose a quadrilateral whose area is .

#### SIMILAR QUESTIONS

Q1

Consider three points , and , then

Q2

The lines p(p2 + 1)x – y + q = 0 and (p2 + 1)2 x + (p2 + 1)y + 2q = 0 are perpendicular to a common line for

Q3

The number of integral values of m, for which the x-coordinates of the point of intersection of the lines 2x + 4y = 9 and

y = mx + 1 is also an integral is

Q4

Let PS be the median of the triangle with vertices P(2, 2), Q(6, –1) andR(7, 3). The equation of the line passing through

(1, –1) and parallel toPS is

Q5

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

Q6

The point (2, 1) is shifted through a distance units measured parallel to the line x + y = 1 in the direction of decreasing ordinates to reach Q.The image of Q w.r.t. given line is

Q7

Given the family of lines a(2x + y + 4) + b(x – 2y – 3) = 0. The number of lines belonging to the family at a distance from any point (2, –3) is

Q8

Given four lines with equations x + 2y – 3 = 0, 3x + 4y – 7 = 0,

2x + 3y – 4 = 0, 4x + 5y – 6 = 0, then

Q9

Area of the parallelogram formed by the lines y = mx, y = mx + 1, y = nxand y = nx + 1 equals.

Q10

A line making an angle with the + ive direction of x-axis passes throughP(5, 6) to meet the line x = 6 at Q and y = 9 at R the QR is