a dime is circle in shape & diameter is a measure of length through the center of a circle -> the stars of a quarter is a transfers of width through the side of the quarter the diameter of a dime is a measure of length through the center of the dime  the diameter of a dime is a measure of length through the center of the dime & a servant is a mean of machine for fillings width -> a ruler can be used to measure the diameter of a dime