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量角器
Author:
jessice
GeoGebra
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算柱 (兩位數)
找出對稱軸
兩組對邊相等和有直角的四邊形
三位數除以一位數（一）
第八周作业
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荒島尋寶
判斷錐體 4
正四角錐
高尔顿钉板实验
P.5 面積問題04
Discover Topics
Pyramid
Straight Lines
Matrices
Statistical Characteristics
Circle