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GeoGebra
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湖南省张毅郴数字教研工作室 logo
拼砌四邊形
兩組對邊相等的四邊形
近似值:有效數字
判斷球體
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不規則填色
frog 4
Locus (Two points 1)
旋轉長方形
康托
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Combinatorics
Tree Diagrams
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Logarithm
Cosine