The 4 interior angles add up to 360 degrees
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360 degrees
80 degree
It is: 47 degrees
A quadrilateral has 4 sides and its 4 interior angles add up to 360 degrees
A vertex of a quadrilateral can have any measure between (but excluding) 0 degrees and 360 degrees. The only requirement is that the four angles add to 360 degrees. So a quadrilateral can have angles of 0.1, 0.1, 0.1 and 359.7 degrees.