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Why are trapezoids outside the parallelogram?
Trapezoids are not considered parallelograms because parallelograms have 2 pairs of parallel sides, whereas trapezoids have only one. Some definitions of trapezoid say "at least one pair of parallel sides" in which case, some trapezoids would be parallelograms (the ones that have 2 pairs of parallel sides), but most textbooks in the US now define trapezoids as "exactly one pair of parallel sides."
Are some trapesoids parallelograms?
No trapezoids are not parallelograms. Trapezoids are actually quadrilaterals and they have one pair of opposite sides. Parallelograms by definition have 2 pairs of parallel sides.
Does an isosceles trapezoid have 2 pairs of parallel sides?
No. All trapezoids have only one pair of parallel sides which are different in length. In an isosceles trapezoid the lengths of the two non-parallel sides are equal.
Can some trapezoids be parallelograms?
No because a trapezoid only has 1 pair of parallel sides whereas a parallelogram has 2 pairs of parallel sides but they are both 4 sided quadrilaterals.
Do trapezoids have 2 sides that are the same length?
No but they do have one set of parallel sides
