Lawv tshwj xeeb vim txhua lub ntsej muag yog lub ntsej muag tsis tu ncua polygon Ib txwm muaj hexagon txhais tau tias yog hexagon uas yog ob qho tib si sib npaug thiab sib npaug. Nws yog bicentric, txhais tau hais tias nws yog ob qho tib si cyclic (muaj ib lub voj voog ncig) thiab tangential (muaj ib lub voj voog inscribed). lub sij hawm apothem (lub vojvoog ntawm lub voj voog inscribed). Tag nrho cov kaum sab hauv yog 120 degrees. https://en.wikipedia.org › wiki › Hexagon
Hexagon - Wikipedia
ntawm qhov loj thiab zoo tib yam. Piv txwv li: txhua lub ntsej muag ntawm lub voos xwmfab yog square. Lawv kuj yog convex (tsis muaj "dents" lossis indentations hauv lawv). Lawv muaj npe tom qab Plato, tus kws tshawb fawb Greek nto moo thiab lej.
Vim li cas Platonic solids hu ua platonic?
Lawv muaj npe rau tus kws tshawb fawb Greek thaum ub Plato uas xav txog hauv ib qho ntawm nws cov lus sib tham, Timaeus, tias cov khoom qub tau ua los ntawm cov khoom tsis tu ncua. …
Vim li cas Platonic solids tseem ceeb?
tsib Platonic Solids tau xav tias sawv cev rau tsib lub ntsiab lus: lub ntiaj teb, huab cua, hluav taws, dej, thiab lub ntiaj teb. Lub cube cuam tshuam nrog lub ntiaj teb, thiab rov txuas lub zog rau qhov xwm txheej. Lub octahedron yog txuam nrog huab cua, thiab cog kev lees paub thiab kev khuv leej.
Dab tsi ua rau Platonic khoom sib txawv ntawm lwm cov khoom?
Platonic khoom, ib qho ntawm tsib geometric solids uas nws lub ntsej muag yog txhua yam zoo tib yam, tsis tu ncua polygons sib ntsib ntawm tib yam peb sabangles. Kuj tseem hu ua tsib polyhedra tsis tu ncua, lawv muaj tetrahedron (los yog pyramid), lub voos xwmfab, octahedron, dodecahedron, thiab icosahedron.
Platonic cov khoom siv niaj hnub no li cas?
Sib nrug ntawm lawv qhov kev zoo nkauj, ntau qhov kev siv ntawm Platonic cov khib nyiab muaj nyob hauv thev naus laus zis. Piv txwv li,tetrahedrons nquag siv hauv hluav taws xob, icosahedrons tau ua pov thawj tias muaj txiaj ntsig zoo hauv kev ua qauv geophysical, thiab cov neeg hais lus nrog lub ntsej muag polyhedral yog siv los tawm suab lub zog hauv txhua qhov kev qhia.
