there are 8 ways to choose the 1st point
for each of those, there are 7 points to connect to.
But, after all that, you've picked each point twice.
Eight points are placed on a circle. How many lines are possible if each point is connected to each of the other points
2 answers
each of the 8 points is connected to the other 7
8 * 7 = 56 ... BUT ... a line from A to B is the same as a line from B to A ... so 56/2
8 * 7 = 56 ... BUT ... a line from A to B is the same as a line from B to A ... so 56/2