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geo123
Author:
hsu hung yang
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GeoGebra
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四邉形 (四年級) 教師版
判斷球體
拼砌四邊形
三位數除以一位數（一）
異分母分數減法
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圓周 (圖形A)
trigonometry1
正弦余弦刻度尺
a sin(bx+c) + d 的圖形的副本
定积分中的二次函数曲边三角形面积.许兴华数学
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Circumcircle or Circumscribed Circle
Sphere
Random Experiments
Congruence
Normal Distribution