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Angle at Centre and Angle at circumference
Author:
Tsang Ka Chun
GeoGebra
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兩位數除以一位數（一）
【案例】圆柱体内放置一个大球六个小球
【案例】2018年全国1卷理科12题
三位數除以一位數（二）
兩組對邊相等的四邊形
Discover Resources
圓周角的度數
拋物線
尺規作圖平分一個角
函数作图工具的副本
幻彩圆
Discover Topics
Tangent Function
General Quadrilateral
Trapezoid
Quadratic Equations
Dilation