History. Thawj dodecahedron yog pom nyob rau hauv 1739. Txij thaum ntawd los, tsawg kawg 116 yam khoom zoo sib xws tau pom los ntawm Wales mus rau Hungary thiab Spain thiab mus rau sab hnub tuaj ntawm Ltalis, nrog rau feem ntau pom hauv lub teb chaws Yelemees thiab Fabkis. Qhov ntau ntawm 4 mus rau 11 centimeters (1.6 txog 4.3 nyob rau hauv) loj.
Leej twg tsim lub dodecahedron?
Abstract: Lub dodecahedron yog ib qho zoo nkauj ua los ntawm 12 pentagons tsis tu ncua. Nws tsis tshwm sim hauv qhov; Nws tau tsim los ntawm cov Pythagoreans, thiab peb tau nyeem nws thawj zaug hauv cov ntawv sau los ntawm Plato.
Vim li cas thiaj hu ua dodecahedron?
Dodecahedron yog los ntawm Greek lo lus "dōdeka" txhais tau tias "12" thiab "hédra" txhais tau tias "lub ntsej muag lossis lub rooj" uas qhia tau tias nws yog polyhedron nrog 12 sab lossis 12 lub ntsej muag. Yog li ntawd, txhua tus polyhedra nrog 12 sab tuaj yeem hu ua dodecahedron. Nws yog tsim los ntawm 12 lub ntsej muag pentagonal.
Muaj pes tsawg Dodecahedrons tau pom?
Nyob rau xyoo 1739, ib qho txawv txawv, kaum ob sab hollow khoom los ntawm Roman lub sij hawm tau pom nyob rau hauv teb chaws Askiv. Txij thaum ntawd los, ntau dua ib puas dodecahedrons tau raug tshawb pom, tab sis lawv lub hom phiaj tseem tsis paub.
Lub Ntiaj Teb Puas yog dodecahedron?
Lub Ntiaj Teb muaj cov duab ntawm hexahedron lossis lub voos xwmfab (Timaeus 54e–55b). … Txawm hais tias Plato tsis hais txog cov duab ntawm cov tawv tawv no, cov kws tshawb fawb pom zoo tias nws tab tom hinting ntawm dodecahedron, uas yog polyhedron ua los ntawm 12 lub pentagons tsis tu ncua(Fig. 17.2).
