A trapezoid has one surface and its surface area in square units is 0.5*(sum of parallel sides)*height
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A trapezoid is a quadrilateral and has four faces.
A trapezoid has one line of symmetry.
As a trapezoid is a quadrilateral (four-sided) it has four vertices.
A trapezoid or trapezium has four sides, two of which are parallel.
None. A trapezoid has 4 angles, but not 4 angels.