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圓內接四邊形任務二
Author:
Stanley Mak
GeoGebra
New Resources
拼砌四邊形
柱體建築師
三位數除以一位數（一）
四邉形 (四年級) 教師版
兩位數除以一位數（一）
Discover Resources
圓的展開partI
固定面積的圖形周界變化
Angle between Line and Plane
軌跡觀察---模擬摺紙
三角形的三个旁切圆.许兴华数学
Discover Topics
Square
Equilateral Triangles
Root
Median Value
Constructions