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rivergraph
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GeoGebra
New Resources
Radian Angles
Radian Placement Practice
x2x: Spindle
If Pythagoras Had Regular Heptagons...
Ball Structure
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P-P Situation 2:
判斷球體（蛋）
Right Angle Trig
House
Asin(exp) - Catalin I
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Geometry
Random Experiments
Scatter Plot
Binomial Distribution
Rational Numbers