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1大長方形的周界
Author:
maths_p5
GeoGebra
New Resources
盈利與虧蝕
双心四边形
平行線的判定
正方形雪花图案
直線的斜率：水平變化 & 鉛垂變化
Discover Resources
Quiz on Addition and Subtraction of Directed Numbers (1) 有向數加減測驗(1)
謝爾賓斯基三角形
生活
正立方體內的正四面體
勝者即正義
Discover Topics
Plane Figures or Shapes
Line Segment
Symmetry
Cylinder
Inequalities