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教學－與直線有關的角
Author:
Lau Sir
GeoGebra
New Resources
四邉形 (四年級) 教師版
兩組對邊相等和有直角的四邊形
兩組對邊相等的四邊形
四邊形的特性
兩位數除以一位數（一）
Discover Resources
Is this a prism 7
內心
重複排列
Dizzy (Just for Fun)
No.5
Discover Topics
Median Line
Rational Numbers
Area
Pie Chart or Circle Chart
Variance