1.

If the position vectors of vertices of triangle ABC are 3hat(i)+hat(j)+2hat(k),hat(i)-2hat(j)+7hat(k)and-2hat(i)+3hat(j)+5hat(k), then the triangle ABC is

Answer»

RIGHT ANGLED and isosceles
right angled but not isosceles
isosceles but not right angled
equilateral

Answer :D


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