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GeoGebra Lesson
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GeoGebra Lesson
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定长线段在相交直线上滑动
Author:
冯伟冀
GeoGebra
New Resources
美國國旗 (Codex 版)
Fibonacci Clock
Earth with coastline
找出對稱軸
小数 的副本
Discover Resources
孔明棋 (Peg Solitare)
Triangular Number 三角形數
线段的最值
除法Q4
剪切成正三棱柱（制作：李三军，修订：孟宝兴）
Discover Topics
Congruence
Curve Sketching
Cuboid
Cosine
Angles