How many triangles are there in the given figure?

25

The logic followed here is;

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

1+2= 03  (NBS) 

1+2= 03  (ABE)

1+2= 03  (EDA) 

1+2= 03  (COF)

And, the other triangles are;

PQR, ADE, BDE, ADB, BDE, NCF, NOC, LQD, BQT, DUF, STO, SEF, QUO

Therefore, there are 03+03+03+03+13= 25 triangles in the above figure.