Respuesta :

(n - 2) [tex] \times [/tex] 180

(6 - 2) [tex] \times [/tex] 180

4 [tex] \times [/tex] 180 = 720

2x + 9x + 2x + 9x + 9x + 9x = 720

40x = 720

x = 18

Vertex D: 9(18) = 162

D. 162