There are a few places to go when you want to know something, maybe like this
http://www.wikihow.com/Solve-Pythagoras-Theorem-Questions
Answer:
A) 5
Step-by-step explanation:
(7 + 1)( 7+ 2) 7 + 1
I think the answer is b because it make the most sense
I think the answer is 15 inches, but i am not sure because you wrote your question kind of stangely in the middle. Hope this helps :)
