Respuesta :

Aaronwu

Answer:

140°

Step-by-step explanation:

1260°=9 sides

1260°/9=140°

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Chelboy

Answer:140°

Step-by-step explanation:

n=number of sides

Sum of interior angles=1260°

Sum of interior angles=180(n-2)

1260=180(n-2)

n-2=1260/180

n-2=7

Collect like terms

n=7+2

n=9

Size for each angle=1260/9

Size for each angle=140

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