Find the number of triangles in the figure.

Let's count the triangles systematically in the given geometrical pattern:
1. Inside the central inner square:
The square is divided by vertical, horizontal, and diagonal intersection lines.
* Individual single smallest triangles = $4$
* Triangles formed by combining two adjacent small triangles (making up half of the inner square) = $4$
Total triangles inside the inner square = $4+4=8$

2. Outer corner triangles:
The inner square is enclosed within an outer diamond-shaped square, forming one distinct triangle at each corner:
* Top corner triangle = $1$
* Bottom corner triangle = $1$
* Left corner triangle = $1$
* Right corner triangle = $1$
Total outer corner triangles = $4$

3. Grand Total:

$$\text{Total number of triangles}=8\text{ (inner)}+4\text{ (outer)}=12$$