There are 15 lines terminating at a point. The number of angles formed is

There are ten points in a plane. Of these ten points, four points are in a straight line and with the exceptionof these four points, on three points are in the same straight line. Find i. the number of triangles formed, ii the number of straight lines formed iii the number of quadrilaterals formed, by joining these ten points.

There are ten points in a plane. Of these ten points, four points are in a straight line and with the exceptionof these four points, on three points are in the same straight line. Find i. the number of triangles formed, ii the number of straight lines formed iii the number of quadrilaterals formed, by joining these ten points.

If 7 points out of 12 are in the same straight line, then the number of triangles formed is

If 7 points out of 12 are in the same straight line, then the number of triangles formed is :

If 7 points out of 12 are in the same straight line,then the number of triangles formed is

If 7 points out of 12 are in the same straight line, then the number of triangles formed is

If 7 points out of 12 are in the same straight line, then the number of triangles formed is