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Reference Angle 參考角
Author:
Alex CHIK
Topic:
Trigonometry
GeoGebra
gMath 互動數學教室
http://www.geogebra.hk
New Resources
Earth with coastline
長方體平面投影 (Codex版)
拼砌四邊形
國旗 (作圖步驟直接餵給 Claude)
第八周作业
Discover Resources
題九
reflectional symmetry_1
圆锥的侧面展开图3D动画的副本
一道三视图的题目（三视图作法参考）
圓周公式應用題2的副本
Discover Topics
Tangent Function
Cube
Multiplication
Geometry
Differential Calculus