Metal-plate work : its patterns and their geometry, also, notes on metals, and rules in mensuration for the use of tin, iron, and zinc plate workers, coppersmiths, boiler-makers, and others (1887)
Millis, C. T. (Charles Thomas) · London ; New York : E. & F.N. Spon · leaf 16
rcumference is a radius (plural, radii). The lino joining the extremities of any arc is a chord. A chord that passes through the centre is a diameter. A line drawn from the centre of, and perpendicular to, any chord that is not a diameter of a circle, will pass through its centre. In practice a… … A D (the curve) is an arc. A B (or B C) is a quadrant. A C B is a semicircle. O A (or 0 B, or B C) is a radius. A D (the straight line) is a chord. A C is a diameter.
Plating · Metallurgy
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
