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angle sum of polygon
Author:
Felix Yip Wing Chung
GeoGebra
New Resources
折扣
直線的斜率：水平變化 & 鉛垂變化
科赫雪花
正方形雪花图案
常见四边形是否是双心四边形
Discover Resources
Task 2 Equilateral Triangle
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平行四边形面积演示
填色
Copie de Comparing fractions using number lines and rectangles
Discover Topics
Circumcircle or Circumscribed Circle
Means
Polygons
Arithmetic Operations
Division