The diagonals of a rectangle do not cross at right angles
The diagonals of a square and a rhombus cross at right angles.
yes, they do. though they are not always equal in length they always cross at right angles.
No but they cross at right angles in a square
you
kite
The diagonals of a kite cross each other at right angles
rectangle
No
No.
No.
A square or rectangle has all right angles. More complex shapes can also have all right angles, notably forms such as the outline "cross" (e.g. Red Cross), which is an irregular dodecagon having twelve sides. The Greek cross is equilateral, the Latin cross is not.