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It is because parallelograms are in definition, is a quadrilateral with two pairs of parallel sides. So that means the angles don't have to be 90 degrees like the rectangle has to; as long as two pairs of sides are parallel and is a quadrilateral, it is a parallelogram.
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∙ 13y ago
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Are there some parallelograms that are rectangles?
All rectangles are parallelograms, so yes there are some.
Are all parrellelograms rectangles?
No. Only some parallelograms are rectangles. But all rectangles are parallelograms.
Can a parallelogram also be a rectangle?
Some parallelograms are rectangles; all rectangles are parallelograms.
Are some or all parallelograms rectangles?
yes
There are some parallelograms which are rectangles?
yes, it is true
Are some parallelograms rectangles?
In fact, some are rectangles, but not all are.
Are there some parallelograms that are rectangles?
All rectangles are parallelograms, so yes there are some.
Are all parrellelograms rectangles?
No. Only some parallelograms are rectangles. But all rectangles are parallelograms.
Can a parallelogram also be a rectangle?
Some parallelograms are rectangles; all rectangles are parallelograms.
Is some rectangles parallelograms?
All of them are.
Some rectangles are not parallelograms?
false
There are some parallelograms that are rectangles?
True
Some parallelograms are also rectangles?
Yes.
Do parallelograms have congruent diagonals?
Some of them (rectangles) do.
There are some parallelograms which are rectangles?
yes, it is true
Are some parallelograms ever rectangles?
Yes
Are some or all parallelograms rectangles?
yes
