Answer:
Regular hexagon =720
Regular octagon=1080
Step-by-step explanation:
The formula is (n-2) x 180, «n» is the side number of the polygon
The first one
So (n-2) x 180
(6-2) x 180
4 x 180
720
And the second polygon
(n-2)x 180
(8-2) x 180
6 x 180
1080
