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Are parallelograms rhombuses?
Some parallelograms are rhombuses, but all rhombuses are parallelograms. A parallelogram is a rhombus if and only if all of it's sides are the same length.
Can a quadrilateral be a parallelogram and a rhombus?
Yes. All rhombuses are parallelograms, but the reverse is not true. (I.e. there are parallelograms which are rhombuses and there a parallelograms that are not rhombuses. -- Just like Every bus has wheels but not everything with wheels is a bus.)
What parallelograms are not rectangles?
rhombuses
Some parallelograms are squares?
By definition, all squares are parallelograms. Not all parallelograms, however, are squares. All rectangles and rhombuses are also parallelograms.
Are all rhombuses also rectangles?
No. Rhombuses that are also rectangles are called squares. Rhombuses are parallelograms with 4 equal sides, while rectangles are parallelograms where all the angles are right.
Are parallelograms and rhombus the same think?
No. All rhombi (rhombuses) are parallelograms but all parallelograms are not rhombi.
Are some trapezoids rhombuses?
Yes. To be a trapezoid, a quadrilateral must have one pair of sides that are parallel. Since rhombuses are parallelograms, they are all also trapezoids, so a subset of trapezoids are rhombuses.
What shapes are also parallelograms?
squares, rectangles, rhombuses
Why are all squares rhombuses?
Are all rectangles parallelograms
What parallelograms don't have right angles?
Rhombi (or rhombuses)
Which three quadrilaterals have obtuse angles?
parallelograms, rhombuses, & hexagons
Are all rhombuses parellelograms?
All rhombuses are parallelograms because to be a parallelogram you only have to have four sides and have opposite sides congruent.
