[填空题]
A right pyramid has apex V and square base ABCD, with AB =es+,vpt .id9us2)kw v lp9.dy 3 cm8rgji:c;h yhl1 ha- ;y. The vertical height of the pyramid, V8ac1h; yh-rh:ilgy;j M, is 12 cm.
1.Calculate the length of VA. cm
2.Calculate the volume of the pyramid.