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三角形的四心－五線－內外二圓
Author:
Ho-Kai Chen
四心：內外重垂
GeoGebra
New Resources
【案例】圆柱体内放置一个大球六个小球
球体的体积推导
三位數除以一位數（一）
【案例】2018年全国1卷理科12题
兩位數除以一位數（二）
Discover Resources
Demonstration of the angles at the same segment
落在區域內的星星
Apollonius Problem gergonne 4
linear regression temp
橢圓1--四圓心近似法
Discover Topics
Median Line
Interest Calculation
Cone
Algebra
Functions