Question

Make a sketch showing four coplanar points such that three, but not four, of them, are collinear.

Short answer

The sketch showing four coplanar points such that three, but not four, of them, are collinear is:

Step-by-step solution

Step 1. Definition of the coplanar points.

The coplanar points are the points that lie on the same plane.

Step 2. Definition of the collinear points.

The collinear points are the points that lie on the same line.

Step 3. Draw the diagram such that four of the points lies on the same plane but only three of them lies on the same line.

The sketch showing four coplanar points such that three, but not four, of them, are collinear is:

It can be observed that the four points A, B, C, and D lie on the same plane that is they are coplanar points, and only three points A, B, and C lie on the same line that is they are collinear points.