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封閉圖形的斜線區域
Author:
張道民
GeoGebra
New Resources
三位數除以一位數（一）
球體建築師
【案例】2018年全国1卷理科12题
四邉形 (四年級) 教師版
異分母分數減法
Discover Resources
Symmetric 設計對稱圖案(一條對稱軸)(垂直)
電子幾何條
三角形3,4,5
直線上的鄰角_2
第八周作业3
Discover Topics
Frequency Distribution
Area
Vectors 3D (Three-Dimensional)
Integers
Differential Equation