octagon的复数形式怎么拼写

Various windows embellish the corridor, with the shape of square, circle, hexagon and octagon.走廊的窗户形状各异，有方形，有圆形，有六角形，也有八角形。The design of octagon vase is tall and simple; the glaze color is green and clear.八棱瓶造型简洁挺拔, 釉色青绿...

octagon的音标：octagon的英式发音音标为：['ɒktəgən]octagon的美式发音音标为：['ɑktəgɑn]...

n.八边形，八角形...