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小正多边形在大正多边形内的滚动（边长不相等）
Author:
孟宝兴
GeoGebra
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Claude 解幾何題
Earth with coastline
Nested spiral octagon
AI 訓練教室
中華民國國旗 (Codex╱2026.10.06)
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圓內接四邊形 ABCD ...，求 sinθ=?
直角座標轉為極座標
拼出三角形的副本
Solve ax + b = c | 解方程（樣式： ax + b = c ）
正三角形在长方形边上移动加滚动
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Coordinates
Symmetry
Histogram
Linear Functions
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