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圓錐曲綫

出自維基百科,自由嘅百科全書
圓錐曲綫
1: 拋物綫
2: 橢圓、圓
3: 雙曲綫

圓錐曲綫,又叫二次曲綫,係幾何學入面由平切圓錐得出嚟嘅曲綫,包括咗橢圓拋物綫雙曲綫圓形屬於橢圓嘅一種,不過都有啲人將圓特別區分出嚟做第四種。

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