A) scalene
B) equilateral triangle
C) isosceles
D) right angled isosceles
Correct Answer: C
Solution :
Let equation of \[AB:x+3y=4\] Let equation of\[BC:3x+y=4\] Let equation of \[CA:x+y=0\] Now, By solving these equations we get \[A=(-2,2),B=(1,1)\]and\[C=(2,-2)\] Now,\[AB=\sqrt{9+1}=\sqrt{10},\] \[BC=\sqrt{1+9}=\sqrt{10}\] and\[CA=\sqrt{16+16}=\sqrt{32}\] Since, length of AB and BC are same therefore triangle is isosceles.You need to login to perform this action.
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