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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
兩位數除以一位數（一）
畫出對稱圖形
【案例】2018年全国1卷理科12题
異分母分數減法
找出對稱軸
Discover Resources
象形圖_李樂雯
優良作品4(薇如)
圓上圓
最佳解
反射原理的副本
Discover Topics
Polynomial Functions
Linear Equations
Pythagoras or Pythagorean Theorem
Geometric Transformations
General Quadrilateral