Respuesta :

calculista
we know that
circumference=2*pi*r
for r=5 cm
circumference=2*pi*5-----> 31.4 cm

if 360° (full circle) has a length of------------> 31.4 cm
 225°-----------------------------> X
X=225*31.4/360-----> X=19.625-----> x=19.63 cm

the answer is
19.3 cm