Points (-2, 4, 7), (3, -6, -8) and (1, -2, -2) are - Vidyadip

MCQ

Points $(-2, 4, 7), (3, -6, -8)$ and $(1, -2, -2)$ are

✓
Collinear
B
Vertices of an equilateral triangle
C
Vertices of an isosceles triangle
D
None of these

✓

Answer

Correct option: A.

Collinear

a
(a) Here, $\frac{{(3 - ( - 2))}}{{1 - 3}} = \frac{{ - 6 - 4}}{{ - 2 - ( - 6)}} = \frac{{ - 8 - 7}}{{ - 2 - ( - 8)}}$

==> $ - \frac{5}{2} = - \frac{5}{2} = - \frac{5}{2}$ Obviously, points are collinear.

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