Respuesta :

Nirina7
the answer is 
s= r x teta, teta = 36Á= 0.62 rad
so r = s / teta , r = 12/0.62 = 19.35 cm

Answer:

60/pi

Step-by-step explanation:

12=2*pi*r*(36/360)

12=2*pi*r*(1/10)

r=16/1*15/4pi= 60/pi

r=60/pi