A square is a parallelogram where diagonals bisect each other to form ___.
right-angled triangles
A square is a parallelogram in which the diagonals are equal and bisect each other at right angles.
Thus, four triangles that are formed have one of the angles with measure 90∘ and two sides equal.
Hence, a square is a parallelogram, where diagonals bisect each other to form four right-angled triangles.