Street angles II

This task is about angle properties.
map of some streets
 
North, Centre, and South Streets are parallel, and West and East Avenues are parallel.
The angles in this picture are not drawn to size, so do not measure them with a protractor.

Question 2Change answer

Use your knowledge of angles to work out the missing angles at each of these intersections.
a)  Centre St. and West Ave.   a =  °

b)  South St. and West Ave.    b =  °

c)  South St. and East Ave.      c =  °