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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
画直线等分三角形的面积
畫出對稱圖形
【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
四邊形的特性
Discover Resources
多項式乘法
海市蜃樓
Percentage Change 百分改變
習題二
congruent (SSS)
Discover Topics
Translation
Congruence
Division
Subtraction
Step Functions