There are 64 triangles in the image,

there are 20 square boxes each box have 2 traingles = 20X2=40,

if u see every 4 boxes joined 4 triangles= 5X4=20,

from leftside box start go upto upside second row box get down from there u see 1 triangle,

like that all 4 sides have 1 big traingle 1 X4 = 4.

total Triangles = 64.