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BMIBMI
Author:
李春培
BMI
GeoGebra
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sanjiaohanshu
近似值：有效數字
畫出對稱圖形
四邉形 (四年級) 教師版
兩組對邊相等和有直角的四邊形
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soccer(final)
不等式組-活動一
Griffiths Theorem
六年級
探究平行四邊形面積
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Mathematics
Rhombus
Geometry
Real Numbers
Congruence