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三角形内角和演示
Author:
啊哦呃
改变三角形的形状，其内角和不变。
GeoGebra
New Resources
Nested spiral octagon
Fibonacci Clock
畫出對稱圖形
拼砌四邊形
長方體平面投影 (Codex版)
Discover Resources
Symmetric設計對稱圖案(一條對稱軸)
MFS Pyth Thm 1
正弦定理验证
對數的平移效果
正四面體碎形
Discover Topics
Logic
Similar Triangles
Bar Chart or Bar Graph
Arithmetic Mean
Unit Circle