If the radius of a circle is 18mm, its diameter is: 36mm
The answer is 9
9mm
9 mm
Diameter = 2 x radius = 18 mm .
18mm or 1.8 cm
The radius of any circle is its diameter divided in half. So: 18mm/2 = a radius of 9mm
The diameter of a circle is twice its radius
The radius of a circle is half the diameter so if the radius of a circle is r, then the diameter is 2r.
The diameter of a circle is twice its radius
The radius of a circle is always half of the diameter. If the diameter is 85.4, the radius is 42.7.
The radius of a circle is half of the diameter, so the radius of a circle with a diameter of 14in is 7in.