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學習單：三角形任一外角與內角關係
Author:
Tsai, Dung Jung
,
Tim Brzezinski
GeoGebra
New Resources
第八周作业
兩組對邊相等的四邊形
【案例】圆柱体内放置一个大球六个小球
画直线等分三角形的面积
兩位數除以一位數（二）
Discover Resources
教學－面與面的夾角
o'clcok
座標變換_數線
翻轉方塊(單開)
Locus: P equidistant from two fixed points
Discover Topics
Planes
Combinatorics
Histogram
Mathematics
Arithmetic