Points , and are the vertices of a triangle. The measure of (to the nearest whole…

MATHEMATICS · Single correct · CBSE · Mathematics · Vector Algebra · Vector Algebra

Problem

Points

A(1,1,1)

B(4,3,2)

and

C(2,5,5)

are the vertices of a triangle. The measure of

\angle ABC

(to the nearest whole number) is (a)

86^\circ

(b)

94^\circ

(c)

79^\circ

(d)

97^\circ