Txoj kab ncaj nraim yog cov khoom geometric tseem ceeb ntawm lub dav hlau thiab hauv qhov chaw peb sab. Nws yog los ntawm cov kab ncaj nraim uas muaj ntau daim duab tsim, piv txwv li: ib qho parallelogram, daim duab peb sab, lub prism, lub pyramid, thiab lwm yam. Xav txog hauv kab lus ntau txoj hauv kev ntawm kev teeb tsa cov kab sib npaug. Kawg hloov kho: 2024-01-02 17:01