There are n points in a plane of which no three are in a straight line except 'm' which are all in a straight line. Then the number of different quadrilaterals, that can be formed with the given points as vertices, is

There are n points in a plane , of which no three are collinear expept m which are collinear. Find the number of triangles formed by joining the points.

out of 18 points in a plane no three are in the same straight lines except five points which are collinear how many straight lines can be formed by joining them?

4 points out of 8 points in a plane are collinear number of different quadrilateral that can be formed by joining them is

out of 18 points in a plane no three are in the same straight lines except five points which are collinear how many triangles can be formed by joining them?

There are 10 points in a plane of which no three points are collinear and four points are concyclic. The number of different circles that can be drawn through at least three points of these points is (A) 116 (B) 120 (C) 117 (D) none of these

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

Give example of a molecule in which all the aoms lie in a straight line.

There are 15 points in a plane of which 4 points lie in one stright line and another 5 points lie in another straight line . The two lines are parallel and no three of the remaining 6 points are collinear . Find (a) the number of straight lines and (b) the number of trangles that can be formed by joining the 15 points .

If 5 parallel straight lines are intersected by 4 parallel straight lines then the number of parallelograms thus formed is

In a plane there are 10 points out of which no three are collinear except the four which lie on a straight line . By joining these 10 points how many triangles may be obtained.