A rectangle.
It can be but a square and a rhombus diagonals are also perpendicular and therefore intersect at 90 degrees and they too are both quadrilaterals.
Because it doesn't but it does have 4 sides which makes it a quadrilateral polygon and it's diagonals intersect at 90 degrees.
A square, a rhombus and a kite have diagonals that intersect each other at 90 degrees.
Square (also rhombus)
It is a kite that has diagonals that intersect each other at 90 degrees.
None but the diagonals intersect at 90 degrees
No but they do intersect each other at 90 degrees
Yes the perpendicular diagonals intersect at right angles or 90 degrees
No, the diagonals of a rhombus are not congruent, but they do intersect each other at 90 degrees.
The diagonals of a rhombus intersect each other at 90 degrees
Any quadrilateral other than a square or kite could have diagonals meeting at 30 degrees.
No but the diagonals of a square, rhombus and a kite do intersect each other at 90 degrees