A high-school astronomy: in which the descriptive, physical, and practical are combined .. (1859)
Mattison, Hiram, 1811-1868 · New York, Mason brothers · leaf 26
DIAMETER* CIRCUMFER-ENCE, ETC. … The Diameter of a circle is a rightline passing through its center, and ter-minating each way in the circumfer-ence. The Radius of a circle is a right linedrawn fom its center to any point in thecircumference. The plural of radius is radii; and as radii proceed from a common center, light,which…
Astronomy
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