First slide

Equation of line in Straight lines

Question

In an Equilateral triangle ex-centre opposite vertex A is (2, -4) and equation of side BC is x+y-2=0. If coordinates of vertex A is $(α, β)$ then $2 α - β$

Moderate

A

12
B

6
C

-6
D

4

Solution

Vertex A is mirror image of excentre about $x + y - 2 = 0$ . $(α, β)$ is (6,0)

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