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1984全国理14
Author:
常振虎
GeoGebra
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四邉形 (四年級) 教師版
兩組對邊相等和有直角的四邊形
Nested spiral octagon
近似值：有效數字
第八周作业
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平行四邊形面積
林辰洋 ggb作業2
圓心角
Copy of 分數認識
周界2
拼出三角形的副本
Discover Topics
Fractal Geometry
Dilation
Reflection
Circle
Scalene Triangles