Respuesta :

1162986

Answer:

there are 7 sides.

Step-by-step explanation:

hope this helped you

netlarue98

Answer:

7

Step-by-step explanation:

n: number of sides

900 = (n-2)180

900 = 180n - 360  Add 360 to both sides

1260 = 180n Simplify

n = 7