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Angle at Centre and Angle at circumference
Author:
Tsang Ka Chun
GeoGebra
New Resources
兩位數加法
兩位數除以一位數（一）
【案例】2018年全国1卷理科12题
兩組對邊相等和有直角的四邊形
【案例】圆柱体内放置一个大球六个小球
Discover Resources
百分數（小學）：折扣 / 賺賠（HTML5 版）
一元二次方程求根公式
中線定理(阿波羅尼奧斯)定理
斜率
새로운 양식
Discover Topics
Pie Chart or Circle Chart
Expected Value
Special Points
Scalene Triangles
Geometric Transformations