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Do all quadrilaterals have opposite sides parallel?
No, only trapeziums (1 pair), parallelograms and squares (both pairs)
What has two pairs of parallel sides and all sides are equivalent?
A square or a rhombus has two pairs of parallel sides and all sides are equivalent.
Why does a trapezoid have parallel lines?
Well, a trapezoid is a quadrilateral. All regular quadrilaterals have 2 pairs of parallel sides. Ex, squares rectangles and trapezoids
How many pairs of parallel sides are in a prarallelogram?
All parallelograms have two pairs of parallel sides.
Do parallelograms have parallel sides?
Yes. A Parallelogram is a quadrilateral that has two pairs of parallel sides which are opposite each other and of equal length, though the pairs may be of different length to each other. If the angles are all 90° then the parallelogram is also a rectangle. If the angles are all 90° AND all sides are equal then the parallelogram is also a square. All squares are rectangles, but not all rectangles are squares; Similarly all squares are rhombuses but not all rhombuses are squares And all rhombuses, and thus squares, are parallelograms, but not all parallelograms are rhombuses (nor squares).
