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

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

A

equilateral

B

right- angled

C

acute- angled and isosceles

D

obtuse - angled and isosceles

Text Solution

Verified by Experts

The correct Answer is:
D
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