Mattison, Hiram, 1811-1868 · New York, Huntington and Savage, Mason and Law · leaf 23
A SPHERE. tween the two surfaces of theplanes nearest each other. [The spaces A and B in the adjoining cutrepresent the Angle of Inclination.] 37. What is meant by the Area* of a Plane Figure} It is the amount of surface contained therein. 3§. What is a Convex Surface ? CONVEX AND C0NCAVE SURFACKS-…
Astronomy
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