Yes it does. A square is defined as having four equal sides, and four equal angles. Since the internal angles of a four-sided figure must always total 360 degrees - each angle can only be 90 degrees (otherwise known as a right-angle)
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Most of the time, rhombuses have no right angles, but a square is also a rhombus, so if it was a sqare, then there would be four right angles, but it will most likely be none.
There are 4 right angles in a square
A square has four 90 degree angles at each corner
A rhombus does not have four right angles. A square has four right angles, as does a rectangle.
A rectangle has four right angles but is not a square.