Yes, all rectangles have right angles. By definition, a rectangle is a quadrilateral (a four-sided figure) with four angles, and all four of these angles are equal to 90 degrees. This property not only defines rectangles but also distinguishes them from other types of quadrilaterals.
The right angles ensure that the opposite sides of a rectangle are both equal in length and parallel to each other, which is another key characteristic of rectangles. Therefore, the presence of right angles is essential to the identity of a rectangle. In conclusion, if a shape has four right angles, it is unequivocally a rectangle.