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Question 2(Angle)
Author:
Chan Kwan Ho
GeoGebra
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sanjiaohanshu
畫出對稱圖形
近似值：有效數字
算柱 (兩位數)
美國國旗 (Codex 版)
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複數等比級數
glt-c05-06 正六角錐旋轉
相同圖形的拼砌（梯形）
餘數處理
橢圓3-平行四邊形法
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Tree Diagrams
Quadrilaterals
Dilation
General Quadrilateral
Integral Calculus