Ib qho tsis xwm yeem polygon yog ib lub voj voog uas tsis sib xws thiab cov kaum sab xis. Ib qho tsis sib xws tsis yog ib qho yog cuaj-sided duab uas tsis muaj qhov sib npaug los yog kaum sab xis. Ib qho piv txwv ntawm lub ntiaj teb tiag tiag ntawm qhov tsis sib xws yog US Steel Tsev hauv Pittsburgh, Pennsylvania. Nws zoo li zoo li daim duab peb sab nrog txhua lub ces kaum indented.
Ntxhais hmoob sib npaug li cas?
Yog li, cov lej ntawm cov kaum sab hauv ntawm ib qho nonagon yog 1260 degrees. Tag nrho cov sab yog tib qhov ntev (congruent) thiab tag nrho cov ces kaum sab hauv yog tib qhov loj (congruent). Txhawm rau nrhiav qhov ntsuas ntawm cov ces kaum, peb paub tias cov lej ntawm txhua lub kaum sab xis yog 1260 degrees (los ntawm saum toj no)… Thiab muaj cuaj kaum…
Koj hu li cas 9 sab zoo?
In geometry, a nonagon (/ˈnɒnəɡɒn/) lossis enneagon (/ˈɛniəɡɒn/) yog cuaj- sided polygon lossis 9 -gon.
Puas yog nonagon a 9 sided shape?
Ib tug nonagon yog polygon ua nce ntawm 9 sab thiab 9 lub kaum. Nona=Nona + gon qhov Nona txhais tau tias cuaj thiab gon txhais tau tias sab.
10 sab zoo li cas?
Teb (1 ntawm 25): Ib qho khoom kaum sab (polyhedron) yog lub npe hu ua decahedron (peb seem) thaum kaum sab ob daim duab (polygon) hu ua decagon.
