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學習單：三角形任一外角與內角關係
Author:
Tsai, Dung Jung
,
Tim Brzezinski
GeoGebra
New Resources
斜率的值
百分數及其應用
比較五件物件的重量
多邊形的面積
常见四边形是否是双心四边形
Discover Resources
GGB報告
高中數學第三冊
test1
Magic Matches
Wave Interference
Discover Topics
Rhombus
Division
Matrices
Surface
Special Points