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Variable Legend
a= side lengthh= perpendicular heightd₁= diagonal 1d₂= diagonal 2A= area
Area (base × height)
Standard parallelogram formula.
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Area (diagonals)
Half the product of diagonals.
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Perimeter
All four sides equal.
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Diagonal from sides and angle
Use the law of cosines.
d₁
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d₂
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