Let's represent the Alternate angles first:
As we can see angles u,w and y are all Alternate angles of angle "a", They represents the opposite angles.
Now let's represent de corresponding angles:
As we can see above, angles q and s are corresponding angles of angle "a".
Finally let's represent the vertically opposite angle:
As we can see, v,b,x,p,z and r are vertically opposite angles of angle "a".
