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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.
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Continue Learning about Algebra
What is a quadrilateral with 4 right angles?
A quadrilateral with 4 right angles is a rectangle
Does a quadrilateral have right angles?
yes 4 right angles
What quadrilateral does not have 4 right angles?
NO quadrilateral has, except rectangles and squares.
What is a regular quadrilateral with four right angles?
square
What is a quadrilateral with no parallel sides and no right angles?
a trapeziod
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