Solution:
Vertices of ABC are A(-1 ,3,2), B(2, 3, 5) and c(3, 5, -2).
ABC is right angled triangle at A.
A=90o
If the coordinates of the vertices of a ∆ABC are A(- 1, 3, 2), B(2, 3, 5) and C(9, b, – 2), then ∠ A isequal to
If the coordinates of the vertices of a ABC are A(- 1, 3, 2), B(2, 3, 5) and C(9, b, - 2), then A is
equal to
