(1)AB is greater than 2 for a quadrangular pyramid, so sadfe =12 (1+2) ×1= 32.

VB-ADFE= 13SADFE？ AB= 1。

(2) If the midpoint H of AB is taken, HG∨AD, so ∠HGE is the angle formed by straight line EG and AD.

AG=5，EG=6，HG=2，EH=2。

Therefore, in Rt△EHG, tan ∠ egh = ehhg = 22.

That is, the angle between the straight line EF and AG is arctan22. ..