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Apollonius Problem 7 CCP Inversion simple 12
Author:
tkyggb
GeoGebra
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Earth with coastline
近似值：有效數字
美國國旗 (Codex, 2026.10.06)
幾何作圖題：切三圓（題目）
Nested spiral octagon
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自製工具：「星星」
test for fun
DSE Circle-ACT03B Relationship Between Chords and Angles at Centre
任意四边形各边中点的连线必构成平行四边形.许兴华数学
活工(三)Q2
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Rhombus
Unit Circle
Ratios
Expected Value
Geometric Transformations