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The straight lines x+y=0, 3x+y-4=0 and x...

The straight lines `x+y=0, 3x+y-4=0` and `x+3y-4=0` form a triangle, which is :

A

Isosceles

B

Equilateral

C

Right angled

D

None of these

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The correct Answer is:
A
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