how many angles of a concave quadrilateral are greater than 180°? show by figure
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The sum of the interior angles of a concave quadrilateral must be 360 degrees. If three are greater than 90 degrees, the fourth must be less.
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If the angle of a quadrilateral is greater than 180°, then it is called a concave quadrilateral.
In concave quadrilateral only one angle can be greater than 180°.
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