Presumably you mean the sum of the included angles? If so, yes - they can all be cut into 2 triangles and the included angles of any triangle always add up to 180
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A trapezium is a quadrilateral and, as with all quadrilaterals, its interior angles sum to 360 degrees.
The interior angles of all quadrilaterals sum to 360 degrees. Since a parallelogram is a quadrilateral, its interior angles must sum to 360 degrees.
All polygons with four angles (quadrilaterals) have a inner angle sum of 360 degrees.
360
All quadrilaterals have 4 interior angles that add up to 360 degrees.