a state of equilibrium or equipoise
1 is assymetrical because on one side there is a blue wall, while on the other wall it is tiled.
2 is symmetrical because there are 2 tables on the left and right, and one directly in front.
3 is radial because it is 3 chairs around a piece of plywood. Radial is my favourite because it can be awesome for a game room.
Assymetrical is where the place is balanced, but with some differences
Symmetrical is where it is perfectly balanced
Radial balance is where there are seats or other things revolving around a certain object, in this case, plywood.