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Author:Peng Zheng

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Perimeter of Rectangle
Area of a Trapezoid
Mondrian's Puzzle
Fractal Tétraèdre. Dilatation -1/2 centre triangles
The Gardener's Circle

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drink hut/flag pole
Prime Number
zad1
Completing the Square
Modeling Decimal Multiplication

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Subtraction
Optimization Problems
Statistical Characteristics
Solids or 3D Shapes
Piecewise Functions

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