Tus nonagon, tseem hu ua as anneagon, yog 9-sided polygon. Txawm hais tias lo lus "enneagon" yog qhov zoo dua (vim nws siv Greek prefix thiab suffix es tsis txhob sib xyaw Roman / Greek nonagon), lo lus "nonagon," uas yooj yim dua rau kev sau thiab hais, yog siv hauv txoj haujlwm no.
100 daim duab hu li cas?
In geometry, ib hectogon lossis hecatontagon lossis 100-gon yog ib puas-sided polygon.
10 sab zoo li cas?
In geometry, a decagon (los ntawm Greek δέκα déka thiab γωνία gonía, "kaum kaum") yog kaum-sided polygon lossis 10-gon. Tag nrho cov lej ntawm cov kaum sab hauv ntawm ib qho yooj yim decagon yog 1440 °. Ib qho kev sib tshuam tus kheej tsis tu ncua yog lub npe hu ua decagram.
7 sab zoo li cas hu ua?
Ib tug heptagon yog ib tug xya-sided polygon. Nws kuj yog qee zaum hu ua septagon, txawm hais tias qhov kev siv no sib xyaw ua ke Latin prefix sept- (los ntawm septua-, lub ntsiab lus "xya") nrog cov lus Greek -gon (los ntawm gonia, lub ntsiab lus "lub kaum"), thiab yog li tsis pom zoo.
5 sab zoo li cas?
In geometry, a pentagon (los ntawm Greek πέντε pente lub ntsiab lus tsib thiab γωνία gonia lub ntsiab lus lub kaum sab xis) yog tsib-sided polygon lossis 5-gon. Cov txiaj ntsig ntawm cov kaum sab hauv hauv ib qho yooj yim pentagon yog 540 °. Lub pentagon tej zaum yuav yooj yim los yog kev sib tshuam ntawm tus kheej. Ib tus kheej-kev sib tshuam tsis tu ncua pentagon (los yog lub hnub qub pentagon) hu ua pentagram.
