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The practical answer is a parallelogram, which has two sets of parallel opposite sides and two sets of equal opposite angles. This includes rhombi, rectangles, and squares.

A trapezoid (trapezium) has one set of parallel opposite sides that are not equal, but may have non-parallel opposite sides equal in length (isosceles trapezoid).

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Related Questions

Quadrilateral with opposite sides and angles equal?

A parallelogram has opposite sides and angles congruent which means of equal measure.


What is a quadrilateral with opposite sides and angles equal?

Parallogram


What quadrilateral has no equal angles and its opposite sides are parallell?

It is not possible for a quadrilateral in Euclidean plane geometry to have no equal angles and still have its opposite sides parallel.It's possible for a quadrilateral to have no equal angles and two of its sides parallel (opposite ones, obviously; adjacent sides can't possibly be parallel). That would be a trapezoid.


What is a quadrilateral with opposite sides and parallel each pair of opposite sides and angles are congruent?

rhombus


What is a quadrilateral with opposite sides the same length and opposite angles the same?

If both pairs of opposite sides are the same length, and both pairs of opposite angles are the same, the quadrilateral is a parallelogram (rhombus, rectangle, or square).


What has opposite sides not parallel that has 4 sides and 4 angles?

A general quadrilateral.


Quadrilateral with congruent sides and no right angles?

rhombus. The rhombus is a quadrilateral with all sides equal in length. It is also a parallelogram, so opposite sides are parallel and equal in length, and opposite angles are equal.


What is a quadrilateral with four right angles and opposite sides are parallel opposite all sides are congruent?

square


How many sides are there in parallelogram?

Parallelograms have 4 sides, it is a quadrilateral with the opposite sides parallel, and the opposite angles are congruent.4


What has opposite sides not parallel four sides and four angles?

Its a non-planar quadrilateral


You are a quadrilateral with opposite sides parallel and you have 4 right angles what are you?

I am a rectangle.


Which quadrilateral has no right angles and opposite sides of equal length?

a pentagon