C A; in other words, it is impossible. that the circumference of a circle multiplied by half its radius can be the measure of a greater circle. ... we shall have the diameter 1 to its circumference r as the diameter 2 C A is to the circumference Whose radius is C A, that is, l : rr : : 2C A : circ. ... to the number above designated by 1r; and the simplicity of this first approximation has brought it into very general use.
|Title||:||Encyclopædia Metropolitana; Or, Universal Dictionary of Knowledge ...|
|Author||:||Edward Smedley, Hugh James Rose, Henry John Rose|