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封閉圖形的斜線區域
Author:
張道民
GeoGebra
New Resources
四邊形的特性
四邉形 (四年級) 教師版
錐體建築師
【案例】圆柱体内放置一个大球六个小球
算柱 (兩位數)
Discover Resources
example 1_sun
earth
平行四邊形面積
近期新增圖檔
剪切成正三棱柱（制作：李三军，修订：孟宝兴）
Discover Topics
Numbers
Variance
Random Experiments
Limits
Logarithmic Functions