* Velocity requires mass: Velocity is defined as the rate of change of an object's position over time. It's measured in units like meters per second (m/s). To have velocity, something needs to have mass. A square is a concept, not a physical object.
* Velocity needs movement: A square drawn on a piece of paper, or even a square-shaped object, is stationary unless it's moving. If the square is moving, *then* it has a velocity.
To talk about the velocity of a square, you'd need to be talking about the velocity of a physical object that has the shape of a square.
