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利用对称求线段和最值
Author:
梁航宇
GeoGebra
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四邊形的特性
GeoGebra笔记功能体验课件
兩組對邊相等的四邊形
拼砌四邊形
第八周作业
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Ext angle cyclic quad
随机模拟实验（撒豆子估算π）的副本
小数除法
S3 Ch4.3 試做4.6b 三視圖(3D圖)
六边形的向外迭代
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Ellipse
Cylinder
Angles
Quadrilaterals
Isosceles Triangles