Well, honey, the radius of a circle is always half of the diameter. So if the diameter is 30 mm, the radius would be 15 mm. It's basic math, darling. Hope that clears things up for you!
6cm
12mm - half the diameter.
radius = 1/2 x diameter= 1/2 x 39.5 mm= 19.75 mm
8mm
Well, honey, the radius of a circle is always half of the diameter. So if the diameter is 30 mm, the radius would be 15 mm. It's basic math, darling. Hope that clears things up for you!
15mm
6cm
The radius of a circle is always half of the distance of the diameter. If you have a 24 mm diameter - then the radius would be 12 mm.
13 mm. The radius of a circle is 1/2 of the diameter.
24 mm. The diameter is twice the radius.
9 mm
3.5 mm
20 mm. The diameter is always twice the radius.
If the radius of a circle is twice the diameter. The outer diameter of a circle the size of a circle. 32.25 mm = 1.27 inches
12mm - half the diameter.
Diameter = 2 x radius = 18 mm .