How many triangles are in the given shape?

In this type of question, follow the below mentioned pattern:

No. of sides    :     No. of Triangles

      1             :          1

      2             :          5

      3             :          13

      4             :          27

      5             :          48

      6             :          78

      7             :          118

      8             :          170

As shown in the given figure total number of sides of triangles is 4.

Therefore, total number of triangles are 27