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定长线段在相交直线上滑动
Author:
冯伟冀
GeoGebra
New Resources
兩組對邊相等的四邊形
四邊形的特性
第八周作业
判斷球體
【案例】圆柱体内放置一个大球六个小球
Discover Resources
rainbow
探索三角形外角定理
Cube in Perspective 正方體的透視
徐峻彥's GGB book
奇偶性的应用
Discover Topics
Area
Normal Distribution
Probability
Interest Calculation
Standard Deviation