No, they cannot.
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A trapezoid is called a trapezium in the UK (because the UK trapezoid is scalene). In any case, a trapezoid is also a quadrilateral, in that it has four sides.
The volume of any right prism is the area of the base, in this case a trapezoid, multiplied by the height of the prism. The formula for the area of a trapezoid is A = 1/2h(a + b) where a and b are the bases of the trapezoid (the parallel sides). Once you calculate the area of the trapezoidal base of the prism, multiply that number by its height to get its volume.
There can be any number of triangles in a trapezoid. It all depends on the size of the triangles and the size of the trapezoid.
No. A trapezoid does not necessarily have any symmetry.
A trapezoid is a quadrilateral (four-sided figure) with one pair of sides parallel. It is also called a trapezium.The types of trapezoid are :scalene trapezoid - no sides equal in length, no angles equalisosceles trapezoid - base angles equal but opposing, two non-parallel sides equal in lengthright trapezoid - one base angle is a right angle (it will be one-half of a rectangle cut obliquely)A trapezoid is one example of a quadrilateral (any four-sided polygon) and an example of a polygon.