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Author:
Lin Ching Chieh
GeoGebra
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異分母分數減法
錐體建築師
球體建築師
【案例】2013年安徽高考15题
拼砌四邊形
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廣義三角函數
分段2
螢橋國中 陳虹璇
橢圓2-四圓心近似法
正角、負角|Positive angles & Negative angles
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Arithmetic Operations
Similar Triangles
Numbers
Planes
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