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Author:
chen mingchuan
GeoGebra
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兩組對邊相等和有直角的四邊形
畫出對稱圖形
拼砌四邊形
判斷球體
sanjiaohanshu
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分數與小數
軌跡,摺紙,滾動,實驗觀察,曲線
角平分線
二元一次圖形
拋物線5--包絡線法
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Integers
Fractal Geometry
Volume
Cylinder
Coordinates