Question

find the unknown value​

Answer 1

Step-by-step explanation:

$to \: find \: value \: \\ \\ 60 + a = 180 \\ \\ a = 180 \div 60 \\ \\ a = 3$

tq ......

Answer 2

Answer.

b = 60°(vertically opposite angle)

c = a (vertically opposite angle). ---------------(1)

c = b (alternate interior angle)

c =60°

from eq1

a = c

a = 60°