How many triangles are in this drawing

In this simple drawing there are (a lot) of triangles. Can you find them?

Created by Kumar Ankit and shared online the above triangle, received answers range from 4 to 44.
A mathematician has helped on the correct result:

“There are 24 triangles, 25 if you count the signature in the bottom right.”

Martin Silvertant, expert in Martimathics explains:
How many triangles are in this drawing

Image credit Martin Silvertant

via Dailymail