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銀杏葉
Author:
連琨銘
GeoGebra
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直線的斜率
祖冲之的期望：内棋与外棋
兩位數除以一位數（二）
多邊形的面積
平行線的斜率
Discover Resources
Drawing quadrilaterals on the grid or the pinboard
弦中點
面積的量度
任意角的三角函数
元旦快乐（制作：孟宝兴）
Discover Topics
Distributions
Linear Equations
Binomial Distribution
Multiplication
Trigonometry