What is the playing surface called where the college basketball semi-finals are played?

The answer is "floor".

Step-by-step explanation:

The playground on which the semi-finals of basketball was performed is called the Floor. It also has a double-dimensional or three-dimensional ground throughout the form of a square or a rectangle. It may be a Cube, or Cuboid, which would be a Pyramid whenever a surface becomes three-dimensional elevated beyond Earth's level.

cool stunts are flippin i think

sitting on a chair

and using stick feet

i don't know i don't know