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等边三角形旋转
Author:
宋晓燕
GeoGebra
New Resources
正方形雪花图案
百分數及其應用
祖冲之的期望：内棋与外棋
龙形曲线-分形龙
三角函数 的副本
Discover Resources
line equation
佑玟ggb book
Viviani's curve
log functions
分數乘法方塊
Discover Topics
Histogram
Inequalities
Rhombus
Special Points
Statistics