A square or a rectangle.
I think this is impossible the diagonals of a four sided figure will cross
A four-sided figure whose diagonals are perpendicular is a kite. In a kite, two pairs of adjacent sides are equal, and the diagonals intersect at right angles. Additionally, one of the diagonals bisects the other, creating symmetry in the figure. Other quadrilaterals, like rhombuses, also have perpendicular diagonals, but a kite is specifically defined by its side lengths and angle properties.
square, rectangle and an isosceles trapezoid
parellelogram
It is an 8 sided octagon whose 8 interior angle add up to 1080 degrees and has 20 diagonals
a square _ |_|
494.5
A prism.A prism.A prism.A prism.
A six sided figure whose lengths are not all equal in size.
oblique prism
A cube has three pairs of parallel faces and all faces are congruent.
i dont know but i want it answer,,,,,,,,,,,,,,,,,,