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是從中點
Author:
tammy93217
GeoGebra
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【案例】2013年安徽高考15题
兩組對邊相等和有直角的四邊形
拼砌四邊形
兩位數加法
三位數除以一位數（二）
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數未學習社12/15
Contour Lines 等高線
長方形
三视图积木
拋物面的光學性質
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Circumcircle or Circumscribed Circle
Circle
Random Experiments
Cylinder
Histogram