Respuesta :

Answer:

13

Step-by-step explanation:

sum of interior angles in a polygon with n sides is given by,

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

therefore ;

[tex]22 \times 90 = (n - 2) \times 180[/tex]

[tex]n - 2 = 11[/tex]

[tex]n = 13[/tex]