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優良作品4(薇如)
Author:
Ching-Hui Chou
GeoGebra
New Resources
画直线等分三角形的面积
兩位數除以一位數（一）
異分母分數減法
球体的体积推导（优化版）
判斷球體
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垂足三角形
題八
How tall is that?
正四棱錐
将三角形面积一分为二
Discover Topics
Rotation
Similar Triangles
Integers
Congruence
Normal Distribution