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S0E2 勾股定理
Author:
Zelene
GeoGebra
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折扣
正方形雪花图案
双心四边形
科赫雪花
盈利與虧蝕
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平行四邊形面積一
餘弦定理的圖形證明2
Ｍy GGC-1
橢圓1--同心圓法
長方形的周界與長和闊的關係 (學生版)
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Congruence
Numbers
Exponential Functions
Polynomial Functions
Geometry