Chav Tsev Parallelepiped Cov Lus Txhais
Ib qho chaw kab teeb ib txwm muaj peev xwm muab faib ua ntau yam parallelepipeds uas muaj superimposed rau ib leeg hauv daim ntawv ntawm lub ntxaij ntoo los ntawm peb qhov sib txuam sib cais. Yog tias qhov sib cais parallelepiped lub ntxaij ntoo muaj peev xwm ua tiav kom muaj qhov sib txig sib luag ntawm txhua qhov chaw ntxaij ntoo, thiab ntawm thaj chaw no, peb pawg ntawm cov npoo ntawm hexahedron tseem muaj ntau qhov sib xws txoj cai-lub kaum kev sib raug zoo li sai tau nrog qhov ntim tsawg tshaj plaws. Xws li cov kab ke loj sib luag hu ua ib chav kab sib luag (sib luag cellepiped)