Because it complies with the formula for any polygon: (n-2)*180 = sum of interior angles when n is the number of sides of the polygon
A quadrilateral has 4 sides
So (4-2)*180 = 360 degrees
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They sides if a quadrilateral can add up to anything but the angles have to equal 360
360. Any quadrilateral's angles add up to 360.
360
The angles of a quadrilateral add to 360 degrees.
Yes the 4 interior angles of a quadrilateral add up to 360 degrees