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Skidan Aleksandr

Author:aleksandr.skidan

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רישום חופשי
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Parallel Lines and Angles: Thinking Classroom Exploration
巧算長方形周界
Perimeter of a Rectangle with Unknown Sides

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Median of a Triangle
Cosine_Rule
Parallel Lines and Transversal Angles
Moving Constants
Linear Approximation
Erving, Nina (Ex 1)

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Multiplication
Polygons
Means
Ellipse
Fractions

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