alee885
27.09.2019 •
Mathematics
What quadrilateral has atleast one pair of parallel sides,but cannot be called a parallelogram?
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Ответ:
A quadrilateral with one pair of parallel sides is a trapezoid.
If it has two pairs of parallel sides it is a parallelogram, but parallelograms are also trapezoids in the same way that dogs are also mammals.
A parallelogram has two pairs of congruent sides. (They may all be congruent, in which case it is a rhombus, but a rhombus is also a parallelogram in the same way that a poodle is also a dog). Therefore the shape you describe is not a parallelogram.
Ответ: