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圓外切四邊形對邊和等長
Author:
謝易達
GeoGebra
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第八周作业
兩組對邊相等和有直角的四邊形
畫出對稱圖形
算柱 (兩位數)
異分母分數減法
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分水問題
特殊角三角函数值
相似双子模型（任意三角形）
四邊形ADFE的面積是多少？
S3 Ex4.3 Q03(3D圖)
Discover Topics
Correlation
Polynomial Functions
Dilation
Definite Integral
Secant Line or Secant