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Author:
hou yi ting
孢落限
GeoGebra
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四邉形 (四年級) 教師版
近似值：有效數字
兩組對邊相等和有直角的四邊形
柱體建築師
兩位數除以一位數（二）
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任務3
三角形內部一點問題
圓錐曲線的光學性質
旁心
S6G2用随机法来估算圆周率Pi
Discover Topics
Probability
Straight Lines
Line Segment
Polynomial Functions
Vectors