Thread:Monkey D. Luffy;Gomu Gomu No Mi/@comment-25768713-20150409021626/@comment-24808864-20150409225748

y=6, the Asians are all correct.

However, in several of the drawings in this thread, the answer is 8.

I think the issue seems to be stemming from the fact that in the original homework problem picture the second triangle (with y) is rotated around. However, when you drew your own hand-drawn pictures, you rotated it and reflected it which causes the sides to be reversed (try to write a word and then read it's reflection in the bathroom mirror).

You should submit the answer y=6 on that homework sheet. But Balu provides all the correct details for the process to solve the problem so you should read his answer carefully.