Respuesta :

WojtekR
[tex](a+b)^\circ=108^\circ\\\\2a^\circ=b^\circ[/tex]

so:

[tex](a+b)^\circ=(a+2a)^\circ=3a^\circ=108^\circ\\\\a^\circ=36^\circ[/tex]

and

[tex]b^\circ=108^\circ-a^\circ=108^\circ-36^\circ=72^\circ\\\\\boxed{m\angle QNS=b^\circ=72^\circ}[/tex]

Answer:

72

Step-by-step explanation:

Did this before !