A text-book of geometrical drawing, for the use of mechanics and schools, in which the definitions and rules of geometry are familiarly explained .. (1850)
Minifie, William, 1805-1880. [from old catalog] · Baltimore, W. Minifie & co. · leaf 28
de the arc into three equal parts, each containing30°. Thus the degrees of the circle are used to measure angles,and when we speak of an angle of any number of degrees, it isunderstood, that if a circle icith any length of radius, be struckwith one foot of the dividers in the angular point, the… … 2.SEMICIRCLE. SEGMENTS.G B A!
