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龍騰4_1-1課例3
Author:
廖傑成
GeoGebra
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兩組對邊相等的四邊形
異分母分數減法
四邉形 (四年級) 教師版
四邊形的特性
找出對稱軸
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切3塊拼成正方形
根據百分率找數量（一）:例1
三角形的分割與組合(1)
正12面體內接正四面體
operations of matrix 2rd ver
Discover Topics
Frequency Distribution
Geometry
Rational Numbers
Cuboid
Hyperbola