Answer:
i really hope this is right, but i'm not 100 % sure
Explanation:
a convex polygon has 2 sides
720/ 2 = 360
1080/ 2 = 540
2520/2 = 1260
3240/ 2 = 1620
7. a hexagon (6 sides)
8. an octagon (8 sides)
9. hexadecagon (16 sides)
10. icosagon (20 sides)
hope this helps!
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