It is important to think a little outside the box to figure this one out.
The correct answer is 13 triangles, that is, option C.
First, there are nine small triangles, that’s the easiest part.
Then we have three larger triangles that are made up of four small ones.
Finally, we have a large one that is composed of all the other triangles.
9 + 3 + 1 = 13
Did you get the correct answer? Congratulations to you if that’s the case, you are really sharp!