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三角形的外心與外接圓
Author:
大園數學
三角形的外心是三條中垂線的交點,外心到三頂點等距離,此距離即為外接圓半徑。
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距離和
畢式定理 (04)
DSE Circle-ACT03B Relationship Between Chords and Angles at Centre
周界
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Centroid or Barycenter