SOLUTION: find the coordinates of the vertices of triangle ABC formed by the intersection of the lines x+y=0, x=0, y=x-1. Hence find the area of triangle ABC?

SOLUTION: find the coordinates of the vertices of triangle ABC formed by the intersection of the lines x+y=0, x=0, y=x-1. Hence find the area of triangle ABC?

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Question 621411: find the coordinates of the vertices of triangle ABC formed by the intersection of the lines x+y=0, x=0, y=x-1. Hence find the area of triangle ABC?
Answer by Emsley(35) (Show Source): You can put this solution on YOUR website!
x+y=0 meets x=0 at (0,0) y=x-1 meets x=0 at (0,-1)
Solving x+y=0 and y=x-1 simultaneously sub y=x-1 into x+y=0 we get x+x-1=0
2x=1 x=1/2 Sub back to get y=-1/2
So points are (0,0) (0,-1) and (1/2,-1/2)
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