Ib lub tog raj kheej yog ib qho ntawm cov duab peb sab yooj yim uas tau kawm hauv chav kawm geometry hauv tsev kawm ntawv (section solid geometry). Hauv qhov no, teeb meem feem ntau tshwm sim hauv kev xam qhov ntim thiab qhov loj ntawm lub tog raj kheej, nrog rau kev txiav txim siab nws qhov chaw. Cov lus teb rau cov lus nug cim tau muab rau hauv kab lus no