Can You Join 9 Points Using only 4 Lines ?

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 formed by joining 15 points on the plane, in which no line joining any three points?

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

Find the equation of a straight line through the point of intersection of the lines 8x+3y=18, 4x+5y=9 and bisecting the line segment joining the points (5, -4) and(-7, 6) .

Point charges of 9 muC and -6muC are placed at a distance of 90 cm from each other. How many points can you find on line joining the charges where electric potential is zero? At what distance these these points are located from 9 muC ?

If the line joining the points (5,y) and (4,9) is parallel to the line joining the points (0,5) and (1,7) , find the value of y .

If the line joining the points (5,y) and (4,9) is parallel to the line joining the points (0,5) and (1,7) , find the value of y .

The number of straight lines that can be formed by joining 20 points of which 4 points are collinear is