They are both trapezoids and so have one pair of parallel sides.
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Isosceles trapezoid.
A trapezoid is one of them providing it is not an isosceles trapezoid.
Normally none unless it is an isosceles trapezoid then it will have 2 equal end sides of the same lengths
Isosceles trapezium(trapezoid)
Several solutions are possible here. The four sides could be the same length, or different lengths. The only requirement (with respect to lengths) to be called an "isosceles trapezoid" is that two opposite sides have the same length.Several solutions are possible here. The four sides could be the same length, or different lengths. The only requirement (with respect to lengths) to be called an "isosceles trapezoid" is that two opposite sides have the same length.Several solutions are possible here. The four sides could be the same length, or different lengths. The only requirement (with respect to lengths) to be called an "isosceles trapezoid" is that two opposite sides have the same length.Several solutions are possible here. The four sides could be the same length, or different lengths. The only requirement (with respect to lengths) to be called an "isosceles trapezoid" is that two opposite sides have the same length.