3 because 3*90 = 270 degrees
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270. A right angle is ninety degrees.
90+90+90=270 degrees your answer is 270 degrees
It can have 0-4 right angles. If you allow reflex right angles (270 degrees), it can have six of them.
3/4 of a rotation or 270 degrees
No, a quadrilateral can't have three acute angles and one right angle. The angles of a quadrilateral must total 360. The three other angles of a quadrilateral with one right angle would then have to total 270 degrees. If all three were acute (less than 90 degrees), they could not total 270.