A parallelogram is a figure with four straight sides whose opposite sides are parallel and equal in length and whose opposite angles are equal. A trapezoid is also a figure with four straight sides. However, only one pai... More »

A rhombus is a four-sided figure with opposite sides parallel, making it a parallelogram. The rhombus differs from other parallelograms in that all four sides are equal in length. More »

www.reference.com Math Geometry

Trapezoids are not necessarily parallelograms, as a trapezoid only needs one pair of parallel sides, unlike parallelograms, which need two. However, there are two definitions of what a trapezoid is, and one of them consi... More »

www.reference.com Math Geometry Shapes

A rhombus is an equilateral parallelogram, which is a two-dimensional, four-sided figure in which opposite sides are parallel and all sides have equal length. A square fits this definition. However, it is usually conside... More »

www.reference.com Math Geometry Shapes

The difference between a parallelogram and a rhombus is that a parallelogram is a quadrilateral whose opposite sides are parallel to one another regardless of how many sides the figure has, and a rhombus is a parallelogr... More »

A rhombus is a four-sided figure with opposite sides parallel, making it a parallelogram. The rhombus differs from other parallelograms in that all four sides are equal in length. More »

www.reference.com Math Geometry

Calculate the area of a trapezoid by identifying the length of the two parallel bases and the height of the polygon. Then, use the formula A = a + b/2 (h), where "a" and "b" are the two parallel base lengths and "h" refe... More »