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4邊形
Author:
張丰耘
GeoGebra
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【案例】2013年安徽高考15题
兩組對邊相等和有直角的四邊形
柱體建築師
拼砌四邊形
三位數除以一位數（一）
Discover Resources
task 4
相切的三圓
三角函數
Salaries Tax in Hong Kong 薪俸稅
相似三角形
Discover Topics
Curve Sketching
Fractal Geometry
Upper and Lower Sum or Riemann Sum
Pie Chart or Circle Chart
Quadrilaterals