Question

Identify the given figures as collinear or non collinear points.

• A. (a) and (c) are collinear; (b) and (d) are non collinear
• B. (a), (b) and (c) are collinear; (d) is non collinear
• C. (a) and (d) are collinear; (b) and (c) are non collinear
• D. (b) and (c) are collinear; (a) and (d) are non collinear

Answer 1

The correct option is A (a) and (c) are collinear; (b) and (d) are non collinear

In fig. ${}^{\prime }{a}^{\prime }$ and ${}^{\prime }{c}^{\prime }$ points lie on the same plane and they are on the same line. So they are collinear. On the other hand in fig. ${}^{\prime }{b}^{\prime }$ and ${}^{\prime }{c}^{\prime }$ points are on the same plane but they do not lie on the same line so they are non-collinear.