Answer:
y = 80
Step-by-step explanation:
The sum of the interior angles of a polygon is
sum = 180° (n - 2) ← n is the number of sides
Here n = 5 , thus
sum = 180° × 3 = 540°
Sum the internal angles and equate to 540
110 + y + 2y + y + 110 = 540 , that is
4y + 220 = 540 ( subtract 220 from both sides )
4y = 320 ( divide both sides by 4 )
y = 80
