Question

11. In the given fig. AB and AC are opposite rays. If (a -36) = 20°, find Za and Zb.
D
a
bº
С
B,​

Answer 1

Answer:

140

Step-by-step explanation:

Answer:

it is given that

a+b=180........i

and

a-3b=20

subtracting both equations

a+b-a+3b=180-20

4b=160

b=40

put in i

a=140