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congruent (AAA) 2
Author:
Ricky Chan
GeoGebra
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畫出對稱圖形
兩組對邊相等和有直角的四邊形
判斷球體
兩位數除以一位數（二）
第八周作业
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根據百分率找數量（一）: 例2
圓錐的曲面面積
數字組合
pyramid01 by Mr LO WY
畫三角形 題1a 的複本
Discover Topics
Equilateral Triangles
Fractions
Scalene Triangles
Integers
Fractal Geometry