Word · Frequency #27464
octagons
八边形；八角形
octagons is the plural of octagon.
an eight-sided polygon
- 1.
A polygon with eight sides and eight angles.
有八条边和八个角的多边形。
- 2.
an eight-sided polygon
八边形
- 3.
Often in the form Octagon: the arena for mixed martial arts.
常作Octagon:综合格斗的比赛场地。
有八条边和八个角的多边形。；八边形；常作Octagon:综合格斗的比赛场地。；八角形
In use
The stop sign is shaped like an octagon, so drivers can recognize it from far away.
In geometry class, we learned how to calculate the area of an octagon.
The window in the old tower is an octagon, with eight equal sides.
an octagon
octagon 是可数名词，以元音音素开头，所以用 an。
An octagon has eight sides.
八边形有八条边。
octagons
复数形式直接加 -s，表示多个八边形。
Octagons are common in tile patterns.
八边形常见于瓷砖图案中。
Common mistakes
The stop sign is octagon.The stop sign is octagonal.
Connections
Collocations
- regular octagon
- 正八边形
- A regular octagon has eight equal sides and eight equal angles.正八边形有八条相等的边和八个相等的角。
- irregular octagon
- 不规则八边形
- An irregular octagon can have sides of different lengths.不规则八边形的边长可以各不相同。
- draw an octagon
- 画一个八边形
- Use a ruler to draw an octagon.用尺子画一个八边形。
- perimeter of an octagon
- 八边形的周长
- To find the perimeter of an octagon, add the lengths of its eight sides.要求八边形的周长，把它的八条边的长度相加。
- area of an octagon
- 八边形的面积
- You can calculate the area of a regular octagon using its side length.你可以用边长计算正八边形的面积。
Synonyms
Learner notes
Memory Tip
联想：octo表示八，章鱼（octopus）有八条腕；octagon就是八条边的八边形。
Context & Register
语域：neutral 常见场景：几何学、建筑设计、日常描述形状 “octagon”指八边形或八角形，是通用几何术语，日常和正式场合都可用；通常用于描述建筑、物品或场地的形状。
Pronunciation & Spelling
拼写：octagon、hexagon、pentagon、wagon、dragon 都以 -agon 结尾；polygon 以 -gon 结尾。发音：octagon、polygon、hexagon、pentagon 押 /ˌɡɑn/；wagon、dragon 读 /ɡən/，不押韵。octopus 与 octagon 开头都是 oct-，读 /ɑkt/，但结尾不同。拼写相似不等于发音相同。
Learn the forms together
页面下方列出了常见词形变化。学习时注意它们在句子中的语法位置。
Dictionary facts from ECDICT, WIKTIONARY.