No, I really don't think so since if it's sometimes then that's a no since it's not all the time if that's what you mean as in always.
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A rectangle is always a quadrilateral and a parallelogram.
always
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:
False. If both pairs of opposite angles of a quadrilateral are congruent then the quadrilateral is a parallelogram.
It is a parallelogram or an isoangular quadrilateral.