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綱要
Quadrilaterals
Quadrilateral
Trapezium (trapezoid)
Parallelogram
Rhombus
Square
Kite
Rectangle
Quadrilateral: properties
Trapezium: properties
Parallelogram: properties
Rhombus: properties
Square: properties
Kite: properties
Rectangle: properties
Parrallelogram inside a quadrilateral
Parallelogram inside a parallelogram
Quadrilaterals
作者：
Gerrit Stols
Quadrilateral
Trapezium (trapezoid)
Parallelogram
Rhombus
Square
Kite
Rectangle
Quadrilateral: properties
Trapezium: properties
Parallelogram: properties
Rhombus: properties
Square: properties
Kite: properties
Rectangle: properties
Parrallelogram inside a quadrilateral
Parallelogram inside a parallelogram
下一步
Quadrilateral
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