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圓的性質
Author:
陳兪宏
求極值(圓的性質) 拉動O點
GeoGebra
New Resources
兩組對邊相等的四邊形
拼砌四邊形
球体的体积推导（优化版）
四邊形的特性
【案例】圆柱体内放置一个大球六个小球
Discover Resources
電子幾何條
因式分解二次方程
國旗1
Angles in Alternate Segment
数一数
Discover Topics
Variance
Matrices
Constructions
Addition
Multiplication