TRAPESIYa

TRAPESIYa (az yunoni (trapzion — chorkunjai tarafhoyash nobarobar), chorkunjai barjastaero guyand, ki du tarafash ham paralel buda, du tarafi digarash parallel nest (nigared rasm). Tarafhoi parallelro asosho va tarafhoi nooarallelro pahluhoi trapesiya menomand. Trapesiyae, ki dar on tarafhoi pahlui ba ham barobarand, trapesiyai barobarpahlu nom dorad. Diagonalhoi trapesiyai barobarpahlu ba ham barobarand. Trapesiyai barobarpahlu tiri simmetri dorad. Trapesiyaro, ki yak tarafi pahlui ba asos perpendikulyar ast, trapesiyai rostkunja menomand. Masofai bayni asosho balandii trapesiya nomida meshavad. Porchae, ki miyonai tarafhoi pahluii trapesiyaro ba ham mepayvandad, khati miyonai trapesiya nom dorad. Khati miyonai trapesiya ba asosho parallel buda, ba nisfi hosili jami onho barobar ast.
Masohati trapesiya ba hosili zarbi khati miyona bar balandi va yo ba nisfi hosili zarbi diagonalho bar sinusi kunji bayni onho barobar meboshad.