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正弦定理的证明
Author:
梁航宇
GeoGebra
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【案例】2013年安徽高考15题
【案例】2018年全国1卷理科12题
錐體建築師
四邉形 (四年級) 教師版
第八周作业
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物件平移的概念
GeoGebra
Ovuvuevuevue Enyetuenwuevue Ugbemugbem Osas
數學傳播39卷4期, 平面幾何公式思考
x^3导数求导
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Intersection
Step Functions
Arithmetic Mean
Centroid or Barycenter
Quadrilaterals