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区域识别
Author:
阳光
Topic:
Polygons
GeoGebra
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兩位數除以一位數（一）
算柱 (兩位數)
三位數除以一位數（二）
兩位數加法
GeoGebra笔记功能体验课件
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大樂透開獎機
Generalized Pythagorean Theorem
弧長與圓周角成比例
三角形重心的变化2.许兴华数学
多邊形的面積
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Exponent
Confidence Interval
Equilateral Triangles
Sine
Sequences and Series