A parallelogram is a four-sided figure with opposite sides of equal length and angles not equal to 90 degrees (otherwise it would be a rectangle). Diagonally opposite angles will be equal, and adjacent angles will add up to 180 degrees.
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a parallogram
Yes
the opposite sides are the same
Yes, a rhombus is an equilateral parallelogram.
They are both 4 sided quadrilaterals They both have 4 interior angles that add up to 360 degrees They both have 4 exterior angles that add up to 360 degrees They both have 2 diagonals They both have a perimeter which is the sum of their 4 sides They both can be divided into triangles