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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
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兩組對邊相等和有直角的四邊形
兩組對邊相等的四邊形
小数 的副本
算柱 (兩位數)
找出對稱軸
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聯立方程式
Locus (Non parallel lines) _a
分數互化 測試畫面 IPAD
【高中物理】斜面上物体受力立体图2.0
φ的影响
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Boxplot
Diagrams
Surface
Coordinates
Root