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計算減法
Author:
tommy.chan
Topic:
Subtraction
GeoGebra
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兩組對邊相等的四邊形
【案例】圆柱体内放置一个大球六个小球
兩組對邊相等和有直角的四邊形
兩位數加法
畫出對稱圖形
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waaachen
九點圓定理
test area
Pole & Polar
Parabola_Horizontal
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Area
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Algebra
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