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How can you convince me that a rhombus is a parallelogram but a parallelogram is not a rhombus?
A parallelogram requires that opposite sides are parallel and of the same length; it is not a requirement that all four sides are of the same length. A rhombus requires that opposite sides are parallel and all four sides are of the same length. It is possible that a parallelogram can have all four sides of the same length; when it does it now fulfils the requirements of a rhombus, and so is a rhombus. Thus a rhombus is a type of parallelogram (all rhombuses are parallelograms), but there are parallelograms which are not rhombuses (those where there are two sides of one length (opposite and parallel) and the other two sides of a different length).
What is parallelogram none of the sides are the same length?
A parallelogram is a four sided quadrilateral and it has 2 same congruent sides. The top and the bottom.
A parallelagram with all sides the same length?
If a parallelogram has all four sides the same length it's called a square.
What is a quadrilateral and parallelogram with four sides that are all the same length?
A square or a rhombus
Is a parallelogram always a rhombus why?
No, because all four sides need not be the same length.
