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畫三角形 題3d
Author:
GeoGebra Institute of Hong Kong
Topic:
Triangles
GeoGebra
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異分母分數減法
画直线等分三角形的面积
兩位數除以一位數（二）
畫出對稱圖形
兩組對邊相等和有直角的四邊形
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隨機漫步
海市蜃樓
餘弦定理的圖形證明2
畢氏定理1
solid of revolution
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Ratios
Congruence
Hyperbola
Division
Unit Circle