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Trapezium properties

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Trapezium properties diagram
A trapezium is like a rectangle that has "fallen over" slighly, and thus also has an area of its base multiplied by its height.
Length a
Length b
Angle α

Area is
Angle β is
Angle γ is
Height is
Lean is
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Trapeziums are common shapes found in many geometric patterns, and have an important place in basic geometry.