Respuesta :

kosala1478

Answer:

interior angles =180(n-2)

180 (5-2)

180×3=540

540-(155+80+95+90)=x

x=120

S1NGH

Answer:

Step-by-step explanation:

a)   ( n - 2 ) × 180°, where n = 5

     ( 5 - 2 ) × 180° = 3 × 180° = 540°

b)    Total sum must equal 540° so

       80° + 155° + 95° + ( The right angle which is 90° ) + x = 540°

       420° + x = 540°

        x = 120°