Question

How to get angle B and A ?

Answer 1

I think there is something wrong...

Explanation:

Consider the picture:

Looking at your picture it seems that the big triangle OZY should be an equilateral triangle becuse of the `45^@` angle....so that also angle `A+B` should be `45^@` (to get that the sum of the internal angles be `180^@` and having the angle in O at `90^@`).
From this the two sides OZ an OY should be equal (length `14sqrt(2)`).

But if you use Pythagoras applied to OZY you get:
`14^2=(14sqrt(2))^2+(14sqrt(2))^2`
`196=784`!!!!
which is not true!