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正角、負角|Positive angles & Negative angles
Author:
Ricky LI
,
羅驥韡 (Pegasus Roe)
GeoGebra
New Resources
四邊形的特性
兩位數除以一位數（二）
兩組對邊相等和有直角的四邊形
柱體建築師
第八周作业
Discover Resources
happy new year2
Homework2
Demo
拼出三角形的副本
达芬奇椭圆仪
Discover Topics
Natural Numbers
Cosine
Tangent Function
Power Functions
Boxplot