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二次函數
Author:
Terry Chau
Topic:
Quadratic Functions
GeoGebra
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【案例】2013年安徽高考15题
兩組對邊相等的四邊形
兩位數除以一位數（一）
兩組對邊相等和有直角的四邊形
球體建築師
Discover Resources
Polygon Activity
GGB報告
弗雷澤螺旋幻覺圖(難度99%)
頂、棱與面
切线
Discover Topics
Division
Reflection
Upper and Lower Sum or Riemann Sum
Means
Line Segment