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正角、負角|Positive angles & Negative angles
Author:
Ricky LI
,
羅驥韡 (Pegasus Roe)
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
球體建築師
三位數除以一位數（一）
判斷球體
球体的体积推导
Discover Resources
Concept of Similarity 相似的概念
鉛筆畫圓
Box method for multiplication
分數認識
向量阵列
Discover Topics
Fractal Geometry
Circumcircle or Circumscribed Circle
Calculus
Derivative
Diagrams