How many triangles are there in the given figure?

12 20 24 40

24

In figure 1 =  Outer triangle=1+1+1+1 =4 triangles In inner square = 8 triangles ( by manual counting) therefore there are 12 triangles in figure 1 In figure 2 =  Outer triangle=1+1+1+1 =4 triangles In inner square = 8 triangles ( by manual counting) therefore there are 12 triangles in figure 2 So, total triangles = 24