Kenison, Ervin, Bradley, Harry Cyrus, 1871-1936 · New York : The Macmillan Company · leaf 29
Fig. 11 (repeated). Fig. 12. use of a small letter, v, as an exponent. Thus, in Fig. 11, pointa is one corner of the card in space ; the projection of a on His lettered ah; of a on V is called a. In Fig. 12, the object, A,a rectangular block placed in the third quadrant, is projectedon H as Ah, on…
Geometry, Descriptive
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