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平行四邊形的面積
Author:
whtong
GeoGebra
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四邉形 (四年級) 教師版
【案例】2018年全国1卷理科12题
画直线等分三角形的面积
球体的体积推导
判斷球體
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三角形面積.Area of Triangle
優良作品2(孟倫)
畢氏定理
Congruent Triangle (SSS)
橢圓3--平行四邊形法
Discover Topics
Volume
Addition
Ellipse
Rectangle
Piecewise Functions