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动态平衡 圆周角的应用（定角力的变化）
Author:
物理小宋
GeoGebra
New Resources
斜率的值
球体的体积推导
平行線的斜率
讀磅
兩位數加法
Discover Resources
Roger Test Draw
鏡射再旋轉
線之極點定理 / pole of a line theorem
三角形外心探討
Test
Discover Topics
Set Theory
Logarithmic Functions
Expected Value
Area
Geometric Transformations