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固定面積的圖形周界變化
Author:
phcheng
,
GeoGebra Institute of Hong Kong
GeoGebra
New Resources
三位數除以一位數（一）
球体的体积推导（优化版）
【案例】2013年安徽高考15题
兩位數加法
兩組對邊相等的四邊形
Discover Resources
葉子型
proof SAS
折拋物線
Copy of 方格紙上畫四邊形
Copy of 畢氏樹
Discover Topics
Pythagoras or Pythagorean Theorem
Equilateral Triangles
Line Segment
Angles
Polynomial Functions