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正角、負角|Positive angles & Negative angles
Author:
Ricky LI
,
羅驥韡 (Pegasus Roe)
GeoGebra
New Resources
垂直線的斜率
【案例】2013年安徽高考15题
直線的斜率
三位數除以一位數（二）
祖冲之的期望：内棋与外棋
Discover Resources
柱體建築師 1
總結
畢式定理 (13)的副本
了解圓方程(2)的副本
平面鏡多次成像_for_mobile
Discover Topics
Distributions
Set Theory
Unit Circle
Straight Lines
Arithmetic Operations