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parallelogram

   Also found in: Dictionary/thesaurus, Wikipedia, Hutchinson 0.45 sec.
parallelogram, closed plane figure bounded by four line segments, or sides, with opposite pairs of sides parallel and equal in length. The rhombus, rectangle, and square are special types of parallelograms. Any side of a parallelogram is a base; an altitude is the perpendicular distance from a base to the opposite parallel side. The area of a parallelogram is equal to the product of the lengths of its base and altitude. The diagonals of a parallelogram, connecting opposite vertices, bisect one another; either diagonal divides the parallelogram into two congruent triangles.
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If many simultaneously and variously directed forces act on a given body, the direction of its motion cannot coincide with any one of those forces, but will always be a mean- what in mechanics is represented by the diagonal of a parallelogram of forces.
War and Peace by Tolstoy, Leo View in context
This you do at present with perfect confidence, because everyone knows to an inch or two the area occupied by an adult Triangle: but imagine that your Tradesman drags behind his regular and respectable vertex, a parallelogram of twelve or thirteen inches in diagonal: -- what are you to do with such a monster sticking fast in your house door?
Flatland by Abbott, Edwin View in context
On the sides of this triangle had recently been constructed a parallelogram of considerable size, which encroached upon the street remorselessly, according to the familiar uses of the building of that period.
Ten Years Later by Dumas, Alexandre View in context
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