Question

is every quadrilateral is a parallelgram?

Answer 1

Yes they are. This is because a quadrilateral has 4 sides: 2 opposite from each other and another 2 opposite from each other. Indeed, not all side will be parallel but there will always be a parallel pair.

Answer 2

no,because in a parallelogram opposite sides are equal and parallel
quadrilateral may or may not have above property.

Answer 3

Opposite sides don't have to be equal.. A square is a quadrilateral and it a parallelogram and every side of the square is equal to the opposite just like a rectangle and rhombus

Answer 4

square has opposite sides equal & parralel & hence a parallelogram.
A quadrilateral has many forms:
trapezoid,parallelogram,square,rectangle,rhombus etc.
square,rectangle,rhombus are parallelograms with additional properties.

Answer 5

A quadrilateral with all four unequal sides is not a parallelogram.