Consider the five points comprising the vertices of a square and the intersection point of its diagonals. How many triangles can be formed using these points?

Consider 12 points on a plane of which five are collinear. How many triangles can be formed using the 12 points?

A plane contains 20 points of which 6 are collinear. How many different triangle can be formed with these points?

There are n points in a plane of which m points are collinear. How many lines can be formed from these points ?

There are n points in a plane of which p points are collinear. How many lines can be formed from these points?

On a triangle ABC, on the side AB, 5 points are marked, 6 points are marked on the side BC and 3 points are marked on the side AC (none of the points being the vertex of the triangle). How many triangles can be made by using these points?

Seventeen points are marked on plane so that no three points are collinear. How many straight lines can be formed by joining these points?