Parallelogram - Wikipedia, the free encyclopedia
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In geometry , a parallelogram is a quadrilateral with two sets of parallel sides. The opposite or facing sides of a parallelogram are of equal length, and the opposite angles of a parallelogram ...
en.wikipedia.org/wiki/Parallelogram
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Parallelogram definition and properties ... Try this Drag the orange dots on each vertex to reshape the parallelogram. Notice how the opposite sides remain the same length and parallel.
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www.mathopenref.com/parallelogram.html
www.mathopenref.com/parallelogram.html
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Area of Parallelogram: when deriving the area of parallelogram formula from the one for a rectangle one important case is casually omitted. We show that the principle of equality of the areas stands also in that case. ... It's customary to base a demonstration for the area of a parallelogram formula on Figure 1 below:
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www.cut-the-knot.org/Curriculum/Geometry/AreaOfParallel...
www.cut-the-knot.org/Curriculum/Geometry/AreaOfParallelogram.shtml
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A parallelogram is a four-sided plane figure that has two sets of opposite parallel sides. Every parallelogram is a polygon, and more specifically a quadrilateral. ... A parallelogram is a four-sided plane figure that has two sets of opposite parallel sides.
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www.sciencedaily.com/articles/p/parallelogram.htm
www.sciencedaily.com/articles/p/parallelogram.htm
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In this example, properties of rectangles and parallelograms are examined. The emphasis is on identifying what distinguishes a rectangle from a more general parallelogram. Such tasks and the software can help teachers address the Geometry Standard...
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standards.nctm.org/document/eexamples/chap5/5.3/index.h...
standards.nctm.org/document/eexamples/chap5/5.3/index.htm
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The area of a parallelogram is b × h, where b is the length of the base of the parallelogram, and h is the corresponding height. To picture this, consider the parallelogram below: ... The figure formed is a parallelogram having an area of h × (a + b), which is twice the area of one of the trapezoids.
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www.mathleague.com/help/geometry/area.htm
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A parallelogram is a quadrilateral whose opposite sides are parallel. ... Some special parallelograms have their own names: squares, rectangles, rhombuses. A rectangle is a parallelogram whose all angles are equal (i.e. ), a rhombus is a parallelogram whose all sides are equal, and a square is a parallelogram that is...
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planetmath.org/encyclopedia/Parallelogram.html
planetmath.org/encyclopedia/Parallelogram.html
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Parallelograms Properites, Shape, Diagonals, Area and Side Lengths ... Interactive Parallelogram ... Directions: Click any drag any of the points to manipulate the interactive parallelogram. The slope, angle measurments and side lengths will adjust accordingly. Enjoy...
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www.mathwarehouse.com/geometry/quadrilaterals/parallelo...
www.mathwarehouse.com/geometry/quadrilaterals/parallelograms/index.php
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