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Ebbinghaus 错觉v2
Author:
acchu
GeoGebra
New Resources
百分數及其應用
常见四边形是否是双心四边形
圓的基本性質
活动三：应用性质
直線的斜率：水平變化 & 鉛垂變化
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葉子型
擴分
ghk105b19 切線長度
随机模拟实验（撒豆子估算π）的副本
固定三角形的條件−題2的副本
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Sphere
Sequences and Series
Geometry
Vectors 2D (Two-Dimensional)
Reflection