Area of Parallelogram in Terms of Its Diagonals

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The area of a parallelogram (shown in blue) with sides and is . This Demonstration shows that double the area is , where and are the diagonals. So the area of a parallelogram can be expressed in terms of its diagonals and as well as its sides.

Contributed by: Izidor Hafner (January 2016)
Open content licensed under CC BY-NC-SA




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