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No. 7 of Exercise 12C
Author:
Dicky Ho Che Wai
GeoGebra
New Resources
算柱 (兩位數)
幾何作圖題：切三圓（題目）
Fibonacci Clock
伊朗國旗 (Codex╱2026.10.07)
sanjiaohanshu
Discover Resources
落在區域內的星星
垂心與垂線
test
用GGB做遊戲 Math Games By GGB
探究三角形的全等條件
Discover Topics
Vectors 3D (Three-Dimensional)
Scalene Triangles
Arithmetic Mean
Rectangle
Cosine