Question

Please help me out <3

Answer 1

13 sides, 1380 degrees

Explanation:

180 / 3 =60

so every side is 60 degrees

8 : 1080

+60 =

9 : 1140

+60

10 : 1200

+60

11 : 1260

+60

12 : 1320

+60

13 : 1380

done!