Need help asap! thanks! How many ways can you get to the end, only being able to go down or left, and having to avoid the green thing?

What? Is there a picture attachment?

“exterior angles of triangles. an exterior (or external) angle is the angle between one side of a triangle and the extension of an adjacent side. try this drag the orange dots on any vertex to reshape the triangle.” look to get to the answer i explained what it means and other things i hope it you .