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三角
Author:
朱宜萱
GeoGebra
New Resources
算柱 (兩位數)
兩組對邊相等的四邊形
四邊形的特性
兩位數加法
錐體建築師
Discover Resources
三角形面積.Area of Triangle
圖一
林辰洋 凹面鏡反射
homework
圓周角與圓心角之度數關係臆測（圓心在圓周角的外部）
Discover Topics
Quadrilaterals
Scalene Triangles
Similarity Transformation or Similarity
Geometry
Circumcircle or Circumscribed Circle