It has four right angles (90°). The opposite sides are parallel. The diagonals bisect each other. A parallelogram has two pairs of equal sides. It has two pairs of equal angles. The opposite ...

Diagonals turn rectangles into triangles, and triangles are one of the strongest shapes used in construction today. In fact, the 12th tallest building in the world, the John Hancock Center in ...

A square has four right angles (90°). Each diagonal splits a corner into two angles of 45°. Note also that the diagonals cut each other in half at right angles. A rectangle has four right angles.