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椭圆的光学性质
Author:
孟宝兴
GeoGebra
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直角坐標平面上的旋轉變換
四邊形的特性
小数 的副本
判斷球體
兩組對邊相等和有直角的四邊形
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三角形內心_不完美版
大邊對大角
平行四邊形
立體圖形
算幾不等式
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Mode
Difference and Slope
Subtraction
Pythagoras or Pythagorean Theorem
Reflection