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全等—正方形的旋转
Author:
詹凯
Topic:
Congruence
,
Triangles
GeoGebra
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【案例】2013年安徽高考15题
第八周作业
球体的体积推导
四邊形的特性
球体的体积推导（优化版）
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折扣 例3
下和
複合圖形(一)
共垂心
酷狗音乐
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Rotation
Logic
Ratios
Sphere
Matrices