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餘弦定理
Author:
yuchengda
GeoGebra
New Resources
圓周公式的應用
多邊形的面積
直線的斜率：水平變化 & 鉛垂變化
祖冲之的期望：内棋与外棋
正方形雪花图案
Discover Resources
GGB5_3D:展開圖
Conway's Circle
求兩斜線區域的差
再作万年历单晨
二次函數
Discover Topics
Interest Calculation
Piecewise Functions
Symmetry
Trapezium
Bar Chart or Bar Graph