n.七角形；七邊形

The pagoda has a foundation of heptagon. 這座寶塔有個七邊形的底座。

There is a heptagon seat beneath the pagoda. 2.

This pagoda has a foundation which is in a shape of heptagon. 這座寶塔有個七邊形的底座。

It is noted that novel patterns of pentagon and heptagon are formed in some special parameters. 其中五邊形與七邊形的圖案更是奇特。

One of them puts out several print fine heptagon shape design from the wallet to paste the sign to give me and the companion. 其中一人從皮夾中拿出幾張印制精美的七角形圖案貼標(biāo)送給我和同伴。