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Definition: parallelogram from The Penguin Dictionary of Science

A ➤quadrilateral with two pairs of parallel sides.

Summary Article: parallelogram
From The Hutchinson Unabridged Encyclopedia with Atlas and Weather Guide

A quadrilateral (a shape with four sides) with opposite pairs of sides equal in length and parallel, and opposite angles equal. The diagonals of a parallelogram bisect each other. Its area is the product of the length (l) of one side and the perpendicular distance (height h) between this and the opposite side; the formula is A = l × h. In the special case when all four sides are equal in length, the parallelogram is known as a rhombus, and when the internal angles are right angles, it is a rectangle or square.

For example, to find the area of a parallelogram 12 cm long and 6 cm high:

A = l × h, so

A = 12 × 6 = 72 cm2

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parallelogram

### متعلقہ کریڈو مضامین

##### Full text Article rectangle
Philip's Encyclopedia

Four-sided geometric figure (quadrilateral), the interior angles of which are right angles and each pair of opposite sides is of equal length...

##### Full text Article rectangle
The Hutchinson Unabridged Encyclopedia with Atlas and Weather Guide

Quadrilateral (four-sided plane figure) with opposite sides equal and parallel and with each interior angle a right angle (90°). Its area A is the pr

##### Full text Article rectangle
The Penguin Dictionary of Mathematics

A quadrilateral with all four angles right angles. The pairs of opposite sides are equal. If all four sides are equal, the rectangle is a...

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