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製作梯形1 Making trapezium 1
Author:
周錦鋒
GeoGebra
New Resources
兩組對邊相等的四邊形
兩位數加法
兩位數除以一位數（二）
找出對稱軸
球體建築師
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滾動圓周來發現圓周長
題 5
雙曲柄
二維
凸多边形在直线上的滚动
Discover Topics
Intersection
Pie Chart or Circle Chart
Surface
Expected Value
Functions