最終更新日：2024/08/03
A line drawn as a part of the construction of a geometrical figure or problem, but not to appear in the finished plan.
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occult line
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A line drawn as a part of the construction of a geometrical figure or problem, but not to appear in the finished plan.
occult line
DiQt（ディクト）
無料
★★★★★★★★★★
