A trapezoid/trapezium is a quadrilateral (4 sided shape) with exactly one pair of parallel sides.
It is a quadrilateral (a closed plane shape with four linear sides) that has at least one pair of parallel lines for sides
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A plane figure (flat)
A closed figure (it has an interior and exterior)
A polygon (straight sides)
A quadrilateral (four straight sides)
No, a trapezoid cannot have 3 bases. A trapezoid is a quadrilateral with exactly one pair of parallel sides. The parallel sides are called bases of the trapezoid. Therefore, there can only be 2 bases.
The area of a trapezoid is equal to the height, multiplied by the average of the two widths.
Area of a trapezoid = 0.5*(sum of parallel sides)*height
The answer will depend on what information you do have!
Work out each figure separately then add them together: Area of a trapezoid = 0.5*(sum of parallel bases)*height Area of a rectangle = length*height