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r6=7/8太大 可能只r5
Author:
fumiao1119
GeoGebra
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中華民國國旗 (Codex╱2026.10.06)
長方體平面投影 (Codex版)
美國國旗 (Codex, 2026.10.06)
Nested spiral octagon
湖南省张毅郴数字教研工作室 logo
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Quiz on Trigonometric Ratios 辨認三角比：測驗
方格紙
GeoGeBra畫橢圓形的動態軌跡
軌跡觀察---兩圓上線段中點
剪紙問題
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Geometric Mean
Means
Straight Lines
Sine
Dilation