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The four interior angles of a trapezoid add up to 360 degrees
the sum of the angles of a trapizoid equal 360 degrees.
The sum of all of the angles in a trapezoid is 360 degrees. The sum of interior angles for an n-sided polygon is equal to 180(n-2) which, in this case, is 180(4-2) = 360.
A trapezoid is a quadrilateral and like all quadrilaterals it will have a total sum of 360 degrees of interior angles.
The sum of the interior angles is 360 degrees.