We really need more information then that, a date and denomination would help.
2 and a half centimeters, which is about the diameter of a US quarter coin.
Half an inch equals exact 1.27 centimeters.
The denomination is needed for an answer. Please post a new question with more detailed information.
1/2 inch is 12.7mm
half an inch diameter van
The diameter of a crayon is 5/16 of an inch.
2 inches. the radius is half of the diameter
6 inch, because the radius the basically half of the diameter
The radius is half of the diameter. So, if the radius is 7 the diameter is 14.
half of 16 = 8 inches
The radius of a circle is half the diameter, so the radius of a 6 inch diameter circle is 3 in.
1/2 inch + 2*thickness of the pipe.