Answer:
The radius would be 4 millimetres
Explanation:
The radius is the length from one side to the centre of the circle.
The diameter is the length from one side to another.
To work out the radius you would simply divide the diameter of 8 by 2, this gives you 4 millimetres. This is because the radius is half of the diameter.
1) Divide 8 by 2.
