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Illusion 1 内凹的正方形
Author:
谢维
GeoGebra
New Resources
撒针估算面积实验
常见四边形是否是双心四边形
第八周作业
科赫雪花
直線的斜率：水平變化 & 鉛垂變化
Discover Resources
Effects on Dispersion
BkD_act15_04c
直角三角形斜邊上的高
分割正方体
斐波那契螺旋弧线（表格法）
Discover Topics
Definite Integral
Linear Functions
Ellipse
LCM and GCD
Pyramid