Three types of balance
The choir room is rotational because of the chairs. They are in a circular position. Rotational is when something is in a circular position.
The math room is asymmetrical. Because one side has the teacher's desk and not the other side. Asymmetrical is when it's not the same on both sides.
The desks in the history room are symmetrical, because they are the same on each side. Symmetrical is when something is the same on each side.