Parallelograms, such as square, rectangle, and rhombus, have opposite sides that are parallel and equal. Triangles do not meet the criteria for a parallelogram.
Parallelograms are quadrilaterals with opposite sides parallel and equal in length. Shapes that can be named parallelograms include the square, rectangle, and rhombus. A triangle does not fit the definition of a parallelogram as it only has three sides and angles.
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