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凸透鏡的成像（理想）
Author:
joeyliaw.tw
GeoGebra
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兩組對邊相等的四邊形
異分母分數減法
找出對稱軸
錐體建築師
【案例】2018年全国1卷理科12题
Discover Resources
貝氏曲線
Apollonius Problem kissing coin problem
ie 3
ｃｉｒｃｌｅ ｓｅｇｍｅｎｔ2
纏繞畫1
Discover Topics
Ellipse
Bar Chart or Bar Graph
Expected Value
Arithmetic Mean
Rectangle