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旋转 等边三角形内一点
Author:
周胜华
Topic:
Triangles
GeoGebra
New Resources
三位數除以一位數（一）
四邊形的特性
兩位數除以一位數（二）
【案例】2013年安徽高考15题
兩位數加法
Discover Resources
function
九點共圓
兩圓
homework
绘本1-平面直角坐标系复习
Discover Topics
Diagrams
Conic Sections
Area
Difference and Slope
Geometric Transformations