A square has four sides
If you have a box and count each flat part they will be four sides
We want to make a 4 players team, and there are total 8 players. As we know the order of selection does not matter in a team of players, only the combination of players matters.
So we would use concept of Combinations and It will be choose 4 out of 8 players.
The formula for Combination is given as follows :-

Hence, Total number of different teams = 70 combinations.
What is the radius of the circle?