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A rhombus has two opposing acute angles (less than 90º) and two opposing obtuse (greater than 90º) angles, with the opposing sides being parallel and the sides being of equal length.
A parallelogram can have the two acute angles and two obtuse angles, but have sides of different lengths. That is: two opposing sides shorter than the other two opposing sides.
All angles total 360º
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I have two pairs of parallel sides but i have no right angles?
A rhombus, or parallelogram.
What shape has 2 pairs of parallel sides but no right angles?
Parallelogram
What shape has 2 pairs of parallel sides and 2 pairs of equal sides but no right angles?
a parallelogram
What shape is quadrilateral and has two pairs of parallel sides and no right angles?
It's a parallelogram.
When can a parallelogram be a rectangle?
When all 4 corners are right angles. A parallelogram has two pairs of parallel sides. A rectangle has two pairs of parallel sides; therefore a rectangle is a parallelogram. A rectangle also has four 90° angles; a parallelogram does not necessarily have four 90° angles, therefore a parallelogram may, or may not, be a rectangle.
