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圆的面积展开的副本
Author:
hong-z
,
qianqianhouhou
拖动n分圆,拖动展开展开圆,拖动拼图拼成长方形。
GeoGebra
通过上面操作请推导圆的面积公式。
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球體建築師
三位數除以一位數(二)
第八周作业
兩位數除以一位數(二)
畫出對稱圖形
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根據百分率找數量(二): 例4
Reflection 反射變換
gltcf 長方體
Multiplication of Directed Numbers
題 2
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Optimization Problems
Algebra
Pie Chart or Circle Chart
Geometry
Volume