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Do all quadrilaterals have opposite sides parallel?
No, only trapeziums (1 pair), parallelograms and squares (both pairs)
Are all parallelograms trapizoids?
No. Parallelograms are never trapezoids because in order to be a parallelogram there has to be two sets of parallel sides. A trapezoid only has one set of parallel sides.
Are all quadrilaterals also parrelograms?
Quadrilaterals are called parallelograms ONLY if both pairs of opposite sides are equal and parallel to each other.
Differences between parallelograms and trapezoids?
Parallelograms have two pairs of parallel sides, trapezium only one. Both pairs of opposite sides of a parallelogram must be equal, in a trapezium at most one pair can be. Opposite angles of a parallelogram must be equal, not so for a trapezium.
Is a pentogon a parallelogram?
No, parallelograms always have four sides and two sets of parallel sides. Pentagons have five sides only sometimes have parallel sides.
