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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
兩位數加法
【案例】2018年全国1卷理科12题
三位數除以一位數(二)
第八周作业
畫出對稱圖形
Discover Resources
Platonic Solids 柏拉圖立體
DSE
二次函數
畫鐘面的副本
Ghost鬼腳圖遊戲12-13
Discover Topics
Equilateral Triangles
Orthocenter
Incircle or Inscribed Circle
Cuboid
Tree Diagrams