Q. 244.0( 2 Votes )

# The angle between the lines 2x – y + 3 = 0 and x + 2y + 3 = 0 isA. 90°B. 60°C. 45°D. 30°

Let m1 and m2 be the slope of the lines 2x y + 3 = 0 and x + 2y + 3 = 0, respectively.

Let θ be the angle between them.

Here, m1 = 2 and m2

m1m2 = 1

Therefore, the angle between the given lines is 90°.

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