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将军饮马——三角形周长最小
Author:
陈宜红
Topic:
Symmetry
,
Triangles
GeoGebra
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折扣
平行線的判定
斐波那契螺旋弧线（表格法-可动态调节）
中华人民共和国国旗
龙形曲线-分形龙
Discover Resources
Measurement & Classification of Angles 角的量度和分類
函數
給錐體一個名字 4
DSE Mathematics
翰林數學_2下_CH3-2_ASA作圖
Discover Topics
Definite Integral
Optimization Problems
Equilateral Triangles
Prism
Integers