four, well two pairs of angles (they're matched
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yes a rectangle is a parralelogram because it has four parralel lines and has four right angles
If one angle of a p/gram is 90o, the other three MUST also be 90o. (In a p/gram each pair of adjacent angles total 180o)
A rectangle
A parralelogram
None.Also a parallelogram (not parralelogram!) has no lines of symmetry (not semmety!)