[填空题]
A right pyramid has apex V and ,vzd+1fxajk27fs)xu squ tlshsy2ni5itc-( 1d4are base ABCD, with AB = 3 cm. The vertical hei1t 4d (c2lsts -5yniihght of the pyramid, VM, is 12 cm.
1.Calculate the length of VA. cm
2.Calculate the volume of the pyramid. $cm^3$