Question

To make a triangle using three points, the points must be -

• A. collinear
• B. coplanar
• C. both collinear and coplanar.

Answer 1

The correct option is B coplanar

For a triangle to form, the three points must be coplanar and non-collinear.


Here, the triangle $△$ABC lies in a single plane.
Hence, the vertices A, B and C must be coplanar.

Also, when the three points lie in the same line, the included area becomes zero.


Hence, it is not a triangle.