How many rectangles are there in the given figure?

18

The logic followed here is;

(let's keep in mind the base, means how many rectangles are there in the base)

1+2+3= 06 (ALCN) 

1+2+3= 06  (LDNF)

And, the other rectangles are;

APDR, PBRE, BCEF, ACDF, PCRF, ABED

Therefore, the total number of rectangles in the above figure are 06+06+06= 18 rectangles.