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If one diagonal of a quadrilateral bisects the other when is the quadrilateral a parallelogram?
In this case, the quadrilateral is sometimes a parallelogram.
Why is a parallelogram always a quadrilateral but a quadrilateral is only sometimes a parallelogram?
A parallelogram must have 4 sides and so it must be a quadrilateral. However, the sides of a quadrilateral need not be parallel so a quadrilateral need not be a parallelogram.
Are all parallelograms a quadrilaterals always sometimes or never?
YES!!! Always. Quadrilateral are 4 sides 2-dimensional polygons. Of which a parallelogram is one example.
If one pair of opposite sides of a quadrilateral is congruent when is the quadrilateral a parallelogram?
sometimes
What is another name for a quadrilateral?
polygon, sometimes a parallelogram
Is a parallelogram always, never, or sometimes a quadrilateral?
Always
What are all of the ways that a rectangle can be classified?
An oblong, a quadrilateral and sometimes a parallelogram
What is the ways to prove that a quadrilateral is a parallelogram?
If it is a parallelogram, then it has two sets of parallelogram sides. Parallelograms' opposite angles are congruent A parallelogram's bisectors are congruent. * * * * * A parallelogram's bisectors are NOT congruent.
What is a quadrilateral parallelogram?
A quadrilateral is a polygon with four sides. A parallelogram is a quadrilateral in which the opposite sides are parallel.
Is parallelogram and quadrilateral the same thing?
No. A parallelogram is a special kind of quadrilateral.
What shape is a parallelogram but not a quadrilateral?
A shape that is a parallelogram but not a quadrilateral doesn't exist.
Is a quadrilateral always a rectangle?
So sometimes yes A quadrilateral is a polygon with 4 sides. A rectangle is a parallelogram with 4 right angles. A quadrilateral is sometimes a rectangle. Here is an example of a quadrilateral that is not a rectangle:
