The American house carpenter: a treatise upon architecture, cornices and mouldings, framing, doors, windows and stairs. Together with the most important principles of practical geometry (1852)
Hatfield, R. G. (Robert Griffith), 1815-1879 · New York, J. Wiley · leaf 29
Fig. 19. Fig. 20. 47.—A circle is a figure bounded by a curved line, called thecircumference ; which is every where equi-distant from a cer-tain point within, called its centre. The circumference is also called the periphery/, and sometimesthe circle. 48.—The radius of a circle is a right line… … Fi-. 21. 49.—The diameter is a right line passing through the centre,and terminating at two opposite points in the circumference.Hence it is twice the length of the radius, (c d, Fig. 21.) 50.—An arc of a circle is a part of the circumference, (c b orbed, Fig. 21.) 51.—A chord is a right line…
Carpentry · Architecture
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