a:20
b:70
c:20
d:70
e:110
Step by step:
E + 70 = 180 thus, E = 110
A + 70 = 90 thus, A = 20
A + B = 90 thus, B = 70; because A would be equal to 20
B + C = 90 thus, C = 20; because both sides are 90 degrees
E + D = 180 thus, D = 70; because E would be equal to 110
