How many triangles are there in the given figure ?

As per the observation,

in a square there are total visible triangles are 4 + ABE + EFB + ABF + AEF. So total 8 triangles in a square.

and, there are 3 squares => 8 x 3 = 24 triangles

Plus,

AFC, BGD, EBG, FCH => 4 triangles

Thus, total 24 + 4 triangles in the given figure.