Find the area of triangle formed by the lines y-x=0 x+y=0 and x-k=0
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Find the coordinate by solving the equations and the use determinant form I.e 1/2l x1 y1 1 l
l x2 y2 1 l
l x3 y3 1 l
And get the answer
l x2 y2 1 l
l x3 y3 1 l
And get the answer
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