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學習單：三角形面積
Author:
Tsai, Dung Jung
,
harryau
GeoGebra
New Resources
第八周作业
近似值：有效數字
找出對稱軸
球體建築師
兩位數除以一位數（一）
Discover Resources
大字體
廣義三角函數
李樂雯_尋找PI的活動
心臟線
Test
Discover Topics
Arithmetic Operations
Coordinates
Integers
Bar Chart or Bar Graph
Geometric Mean