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angle 123
Author:
zhihuai1982
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
球體建築師
拼砌四邊形
四邊形的特性
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angles sum on a striaght line
一元二次方程式-應用問題(兩圓相切)
平移法（一）
Similar Triangles
Ex.3
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Binomial Distribution
Planes
Boxplot
Bar Chart or Bar Graph
Quadratic Functions