Respuesta :

ujoy64

Answer:

Presuming the 4.2 cm is the radius the diameter would be 8.4 cm

Step-by-step explanation:

Radius is half the diameter

So it would be 4.2 X 2 for the diameter

Correct me if I'm wrong

Answer:

Diameter is twice the radius, therefore 4.2cm radius = 8.4cm diameter.

Step-by-step explanation: