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Sum of Interior Angles of Polygons 多邊形內角和
Author:
Alex CHIK
Topic:
Angles
,
Polygons
GeoGebra
GeoGebra 互動數學教室
http://www.geogebra.hk
New Resources
拼砌四邊形
找出對稱軸
畫出對稱圖形
判斷球體
三位數除以一位數（二）
Discover Resources
圓的內接四邊形
滑桿分段控制的基礎
Geometric Proof of Arithmetic-Geometric Mean Inequality
透過長方形面積方法計算二項式乘二項式
找规律（数阵与点阵）
Discover Topics
Piecewise Functions
Secant Line or Secant
Statistical Characteristics
Circumcircle or Circumscribed Circle
Scalene Triangles