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蝴蝶定理（唐老师的课程）
Author:
龚洪萍
Topic:
Algebra
,
Geometry
GeoGebra
New Resources
兩組對邊相等的四邊形
三位數除以一位數（二）
【案例】2013年安徽高考15题
畫出對稱圖形
四邉形 (四年級) 教師版
Discover Resources
rectangle_tktcps
奈格爾點
Coffee Brewing Control Chart
Template: 對稱01
人教版初中数学教材案例GeoGebra制作系列教程（七年级下册）1-对顶角和邻补角的性质探究
Discover Topics
Dilation
General Quadrilateral
Geometric Mean
Interest Calculation
Incircle or Inscribed Circle