yes 4 right angles
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A quadrilateral with 4 right angles is a rectangle
NO quadrilateral has, except rectangles and squares.
a quadrilateral can have from 0 to 4 right angles. But it can't have exactly three right angles. The interior angles of a quadrilateral sum to 360 degrees. If it had three right angles and x were the measure of the fourth angle: 3*90+x=360 x=360-270=90 So if it has three right angles, the fourth angle would be a right angle as well.
square
a trapeziod