They would be called "supplementary angles" because 90º + 90º = 180º and any two angles that add to 180º form straight, parallel, or congruent lines.
(Angles that add to 90 º are called complementary.)
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Two right angles are supplementary.
A right trapezoid can have no congruent sides and two right angles.
It is a hexagon with two right angles: there is no special name for such a shape.
It has no right angles. It has two acute angles.
no a rectangle has 4 right angles