Looking at the overall picture, one could be easily tricked by the triangular Christmas tree but careful study of the picture, it could be seen that the triangular shapes are not much though.
I can tell that the total triangle in this picture is 6. Looking at the top with the star, there are 3 triangles. Looking at the whole structure and demarcation, their are also 3 triangles, from the left,the middle and right all meeting at the top of the star making it a 3, shaped edged figure triangle.
Note: a triangle has 3 sides, 3 angles and 3 vertices.