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

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

Text Solution

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The correct Answer is:
A
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