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任务9：外凸的正方形
Author:
陈丽婷
GeoGebra
New Resources
美國國旗 (Codex, 2026.10.06)
Earth with coastline
Nested spiral octagon
Claude 解幾何題
美國國旗 (Codex 版)
Discover Resources
Addition of 2 Directed Numbers
擴分
切線斜率的副本
等比数列计算练习
初中函数
Discover Topics
Tangent Function
Difference and Slope
Right Triangles
Quadratic Equations
Real Numbers