| 单词 | concave polygon |
| 释义 | concave polygon (extremely rare) n WORD FAMILY concave polygon n a polygon such that there is a straight line that cuts it in four or more points Ant|Hypo|Hyper convex polygon a polygon such that no side extended cuts any other side or vertex; it can be cut by a straight line in at most two points reentering polygon, reentrant polygon a polygon with one or more reentrant angles polygon, polygonal shape a closed plane figure bounded by straight sides |
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