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S3 Ch9.3 羅盤方位角
Author:
Li Woon Chung
GeoGebra
New Resources
【案例】圆柱体内放置一个大球六个小球
直線的斜率：水平變化 & 鉛垂變化
平行線的斜率
圓的切線方程
漂亮的摇摆曲线
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正三角形尺规作图
Polygon Activity
畫方格
三线八角
Sine Wave 3D