PRIZMA

PRIZMA (yunoni prisma), bisyorruyaest, ki du ruyai n -kunja (a s o s-h o i Prizma) dorad va p to ruyaash (r u ya h o i pahluii II.) parallelogramhoand. Asoshoi Prizma kongruentiand va dar hamvorihoi paralleli voqeand. Agar hamvorii ruyahoi pahlui ba hamvorii asos perpendi­kulyar boshad, Prizmaro rost va agar Prizmai rost bisyorkunjai muntazam bo­shad, onro Prizmai muntazam menomand. Vobasta ba miqdori kunjhoi asos Prizmaho sekunja, chorkunja va gayra meshavand. Hajmi Prizma ba hosili zarbi masohati asos bar balandi (masofai bayni asoshoi Prizma) baro­bar ast. Nig. niz Bisyorruya.