Respuesta :
Hola,
sea: x = radio
x+1 = arco
Entonces:
2x + (x+1) = 19 cm
3x=18 cm
x= 6 cm
sea: x = radio
x+1 = arco
Entonces:
2x + (x+1) = 19 cm
3x=18 cm
x= 6 cm