Question

I need help please and thanks

Answer 1

Explanation:

Total angle of triangle is 180 °

given,40° and 80°

let x be the missing angle

180x=40+80

180x=120

x=120-180

x=60°

=a)60°

Answer 2

60

Explanation:

80+40+x=180

80+40=120

120+x=180

180-120=60

x=60