If the position vectors of the vertices A, B, C of a triangle ABC are , and respectively, the triangle is :
equilateral
isosceless
scalene
right angled and isosceless also
The equation of the bisector of the acute angles between the lines 3x - 4y + 7=0 and 12x + 5y - 2 = 0 is :
99x - 27y - 81 = 0
11x - 3y + 9 = 0
21x + 77y - 101 = 0
21x + 77y + 101 = 0
The area of the parallelogram whose adjacent sides are and is :
2
4
C.