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quiz 9.1 2(d)
Author:
lamanleung
GeoGebra
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找出對稱軸
兩組對邊相等的四邊形
判斷球體
三位數除以一位數（一）
兩組對邊相等和有直角的四邊形
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lab5_task3
長方形和正方形的面積_題F
轉盤1
test
一个二次函数图像
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Expected Value
Pyramid
Angles
Centroid or Barycenter
Conic Sections