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angles sum of a triangle 1
Author:
LAM YU SANG
GeoGebra
New Resources
GeoGebra笔记功能体验课件
直線的斜率
兩位數加法
圓周公式的應用
【案例】圆柱体内放置一个大球六个小球
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K9@cn
平面幾何
兩圓
gyzqx 共頂點的圓錐曲線
斜率乘积为定值（椭圆、双曲线）
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Congruence
Frequency Distribution
Unit Circle
Terms
Tree Diagrams