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九点圆
Author:
Zhang Guangmin
Topic:
Geometry
,
Triangles
GeoGebra
New Resources
畫出對稱圖形
第八周作业
兩位數除以一位數（一）
兩組對邊相等和有直角的四邊形
四邉形 (四年級) 教師版
Discover Resources
捷徑
Chapter 11
分數與小數
reflectional symmetry_2
禪繞畫2
Discover Topics
Cuboid
Division
Pie Chart or Circle Chart
Probability
Geometric Transformations