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買四送一
Author:
周錦鋒
GeoGebra
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正方形雪花图案
直線的斜率：水平變化 & 鉛垂變化
撒针估算面积实验
科赫雪花
圓的基本性質
Discover Resources
Ex5D#9
gmy106a11 轉移矩陣
乘數表
duality of regular polyhedron
圆-视觉差
Discover Topics
LCM and GCD
Pyramid
Sequences and Series
Volume
Trigonometry