What is the number of angles in a square?

A square is defined as a quadrilateral with four equal sides and four right angles. Each angle in a square measures exactly 90 degrees. Therefore, when considering the number of angles present in a square, the total is four. This property is fundamental in geometry and applies to all squares, irrespective of their size. The correct answer reflects this fundamental aspect of a square's definition and properties, thus confirming that a square has four angles.