A square has two diagonals that bisect each other at 90 degrees
they are called parallelogram in which diagonals are equal
Quadrilaterals do not bisect each other. They could in special cases. In parallelograms (types of quadrilaterals), the diagonals bisect each other.
Squares do.
Rhombus and square are the only quadrilaterals whose diagonals bisect the angles of the quadrilateral. In both these quadrilaterals, the diagonals intersect at right angles, dividing each angle into two equal parts.
squares
Parallelograms.
Square, rhombus and a kite have diagonals that bisect each other at 90 degrees
Either a square or rectangle fit this description.
Arrow head
Parallelograms (including rectangles and squares)
They are either kites or (if the diagonals bisect each other) rhombuses.