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平行弦中點的問題
Author:
官長壽(longlife)
GeoGebra
阿壽工坊---
http://120.101.70.8/longlife/
New Resources
【案例】圆柱体内放置一个大球六个小球
兩組對邊相等的四邊形
球体的体积推导（优化版）
判斷球體
柱體建築師
Discover Resources
hihi
軌跡觀察---心臟線
线性方程组
I love Taiwan.(可縮放和移動)
同旁內角---不平行綫
Discover Topics
Algebra
Geometric Transformations
Division
Polynomial Functions
General Quadrilateral