Respuesta :

carlosego
The arc length by definition is given by:
 S = R * theta
 Where,
 R: Radio
 Theta: central angle
 We cleared R:
 R = S / Theta
 Substituting values:
 R = 7 * pi / Theta
 Answer:
 The formula for this case is given by:
 R = 7 * pi / Theta