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In Geometry

A parallelogram: .
is a quadrilateral (a four sided polygon) .
has opposite sides parallel and of equal length .
has opposite angles equal The area of a parallelogram …is calculated by multiplying one sidelength by the perpendicular distance between that side and the sideparallel to it. A rectangle is a special parallelogram in that all four angles areequal and are right angles (90Â°). A rhombus is a special parallelogram in that all four sides are ofequal length. A square is a special parallelogram in that all four angles areequal (and are right angles) and all four sides are equal inlength. (MORE)

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A parallelogram is a plane figure with four straight sides such that the two pairs of sides opposite to one another are also parallel to one another. The bit below, added by …another contributor, is about parallel lines and that is not the same thing! * * * * * A parallelogram is two lines that don't intersect (MORE)

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A parallelogram is a quadrilateral with two parallel sides. Inaddition, parallelograms are often discussed in the mathematicalfield of geometry.

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In Health

All rectangles are parallelograms, but not all parallelograms arerectangles. A parallelogram is a four-sided shape in which the opposite sidesare parallel. A rectangle (and a …square) is a four-sided shape in which theopposite sides are parallel and all corners are 90 degrees. Thecorners of a parallelogram can be 90 degrees but can also bedifferent angles. Therefore, rectangles and squares are subsets ofa parallelogram. (MORE)

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it has all equal sides That's a special case of a parallelogram called a rhombus. A parallelogram has opposite sides equal and parallel.

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In Calculus

A rectangle has three rules: -2 pairs of parallel sides -four 90 degree angles -2 pairs of congruent sides A parallelogram has three rules: -2 pairs of parallel sides - 2 pa…irs of congruent angles -2 pairs of congruent sides The only difference is that a rectangle has 90 degree angles, which a parallelogram doesn't have. That's why a parallelogram can't be a rectangle. A rectangle follows all the rules of being a parallelogram, so it can be a parallelogram. (MORE)

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His inheritance of family wealth, that is 4 sides, and a strict father who disciplined him so all his sides are parallel to each other..

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A parallelogram is a quadrilateral in which each of two sets of opposite sides consists of two parallel lines (or for math purists I should say, parallel line segments).

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In Health

A parallelogram is not a rectangle. However, a rectangle is a parallelogram because it has two pairs of opposite sides that are parallel

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A quadrilateral with opposite sides parallel & having unequal diagonals. .
The distance of diagonals/sides is calculated by the distance formula.