Question

please tell the answer with steps​

Answer 1

Answer:

please tell what is the symbol between a and b it is not clear

Answer 2

Step-by-step explanation:

we know that straight line from 180°

so a+b=180and a-b=80°

solving both equation be get

a+b=180°

a-b=80°

2b=100

b=50

and a=130