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九點(diǎn)圓的意思
九點(diǎn)圓
拼音jiǔ diǎn yuán
注音ㄐ一ㄡˇ ㄉ一ㄢˇ ㄩㄢˊ
繁體九點(diǎn)圓
詞語解釋
九點(diǎn)圓（九點(diǎn)圓）[ jiǔ diǎn yuán ]
⒈ 三角形三邊的中點(diǎn)，三條高的垂足，垂心與三頂點(diǎn)連線的中點(diǎn)，九點(diǎn)共圓。此圓稱為三角形的九點(diǎn)圓。19世紀(jì)由法國(guó)數(shù)學(xué)家龐斯萊首先發(fā)現(xiàn)。
詞語組詞
相關(guān)詞語
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