| 单词 | perigon |
| 例句 | There is also the word "perigon," meaning the whole angular space about a point. The Teaching of Geometry 2011-10-12T02:00:52.133Z The terms "complement," "supplement," and "conjugate," meaning the difference between a given angle and a right angle, straight angle, and perigon respectively, have also entered our vocabulary and need defining. The Teaching of Geometry 2011-10-12T02:00:52.133Z |
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