How many triangles can be obtained by joining 12 points, four of which are collinear?

How many triangles can be obtained by joining 10 points five of which are collinear.

How many Triangles can be formed by joining 12 points, 4 of which are collinear.

How many Straight line can be formed by joining 12 points, 4 of which are collinear.

How many triangles can be formed by joining 6 points lying on a circle ?

How many triangles can be formed by joining 15 points on the plane, in which no line joining any three points?

How many triangles can be formed by joining 15 points on the plane , in which no line joining any three points ?

How many triangles can be fromed by joining 15 points on the plane , in which no line joining any three points ?

How many triangles can be obtained by joining the vertices of a quadrilateral?

How many triangle can be formed by joining 15 points on the plane, in which on line joining any three points?