A trapezoid can have 2. A parallelogram and a rhombus can either have four or none. A rectangle and square always have four.
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The two quadrilaterals that have four right angles are rectangles and squares.
No, one example is a kite that DOES NOT have two right angles. It is not a cyclic quadrilateral. A kite that does have two right angles is one.
"Quadrilateral" simply means "four sided". Some quadrilaterals do have right angles; squares or rectangles, for example. Some have one or two right angles, but some don't have any right (90 degree) angles.
No, only squares and rectangles have 4 right angles.
A rectangle or a square are sets of quadrilaterals with two pairs of right angles. They each have two pairs of right angles and two sets of equal sides.