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固定周界的長方形面積變化
Author:
phcheng
,
GeoGebra Institute of Hong Kong
GeoGebra
New Resources
第八周作业
拼砌四邊形
球体的体积推导（优化版）
兩組對邊相等和有直角的四邊形
画直线等分三角形的面积
Discover Resources
Trajectory of system: y'=sin(y)-y/2
引擎的行程
封閉著色2
Is this a prism 2
两次折叠
Discover Topics
Functions
Kite
Rotation
Reflection
Numbers