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内切圆滚动
Author:
hanmin zhang
GeoGebra
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兩位數除以一位數（一）
圓周公式的應用
斜率的值
兩位數除以一位數（二）
垂直線的斜率
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三角形五心與角度關係
整數或分數÷分數_ 工作紙（一）_題1b
Proofs Without Words
Centroid
圓周_心算題03
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Functions
Fractal Geometry
Median Line
Pyramid
Exponential Functions