[" The greatest possible number of points of intersection "],[" of "8" straight lines and "4" circles is "]

The maximum possible number of points of intersection of 8 straight lines and 4 circles is

Find the number of point of intersection of two straight lines .

The maximum number of points of intersection of 8 straight lines is

Thegreatest possible number of points ofintersection of 9 different straight lines &9 different circles in a plane is