1.

The triangle formed by the lines \[x+y-4=0,\,\] \[3x+y=4,\] \[x+3y=4\] is            [RPET 2002; IIT 1983; MNR 1992; UPSEAT 2001]

A.            Isosceles                                   
B.            Equilateral
C.            Right?angled                            
D.            None of these
Answer» B.            Equilateral


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