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圆的面积展开
Author:
qianqianhouhou
Topic:
Area
,
Circle
拖动n分圆，拖动展开展开圆，拖动拼图拼成长方形。
GeoGebra
New Resources
算柱 (兩位數)
兩位數除以一位數（二）
第八周作业
画直线等分三角形的面积
兩位數加法
Discover Resources
畢氏定理證明
semops_圓錐
Angle of elevation and Angle of depression(仰角和俯角)
切線斜率的副本
内外弦图
Discover Topics
Exponent
Right Triangles
Symmetry
Quadrilaterals
Histogram