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bkb-切割线定理
Author:
梁航宇
GeoGebra
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四邉形 (四年級) 教師版
拼砌四邊形
畫出對稱圖形
柱體建築師
兩組對邊相等的四邊形
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鋪地磚(六邊形)
較複雜的周界問題(二)
繡曲線
探索勾股三元数
球面坐標
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Arithmetic Operations
Mode
Angles
Statistics
Congruence