Answer:
a=45
b=135
c=135
d=135
Step-by-step explanation:
You can find a because 135 and make a straight line and therefore equal 180.
180-135=45
You can find b because 135 and b are vertical angles and therefore they have the same measurement.
You can find c because 135 and c are corresponding angles and therefore they have the same measurement.
You can find d because 135 and d are exterior alternate angles and therefore have the same measurement.
