The regular polygon is a regular hexagon (6 congruent angles 6 congruent sides) so using the formula for the sum of interior angles of an nn-gon, we have:

6(3x)=(n−2)(180)

18x=(6−2)(180)

18x=4(180)

x=4(180)18

x=40

6(3x)=(n−2)(180)

18x=(6−2)(180)

18x=4(180)

x=4(180)18

x=40