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Author:
iedc
GeoGebra
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兩位數加法
兩組對邊相等的四邊形
画直线等分三角形的面积
找出對稱軸
算柱 (兩位數)
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gjh-f03-00 司乃耳定律
anlge at centre twice angle at circumference
拋物線:切線與弦中點
练习
圓的面積的副本
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Mathematics
Kite
Natural Numbers
Fractions
Probability