The new American practical navigator : being an epitome of navigation, containing all the tables necessary ... (1802)
Bowditch, Nathaniel, 1773-1838, Lee, Marvin, former owner. DSI, Stuart, Gilbert, 1755-1828 DSI, Burndy Library, donor. DSI · [Salem] : Printed at Newburyport, Mass., 1802, by Edmund M. Blunt, for Cushing and Appleton, Salem : Sold by every book-seller, ship- chandler, and mathematical-instrument-maker in the United States and West Indies · leaf 38
triangles D B C,ABH are equal (by Art. 39,) but the triangleD B C is half of the fquare A B D E (by Art.50)and the triangle A B H is half the parallelogramBKLH (by the fame Art.) confequently thefquare A B D E is equal to the parallelogramBKLH. In the fame way it may be proved, that the fquare ACGF… … n^ Geometry. BCMH, therefore the fum of the fquares on AB and AC is equal to thefquare on BC. Cor. Heuce in any right angled triangle, if we have the hypotenufeand one of the legs, we may eaiily find the other leg, by taking the fquareof the given leg from the fquare of the hypotenufe, the fquare…
Navigation · Nautical astronomy
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![An illustration from Divina proportione : opera a tutti glingegni perspicaci e curiosi necessaria oue ciascun studioso di philosophia: prospettiua pictura sculptura: architectura: musica: e altre mathematice: suavissima: sotile: e admirabile doctrina consequira: e delecterassi: co[n] varie questione de secretissima scientia (1509)](https://img.insideoutlibrary.com/img/200/ia-divinaproportion00paci-90-157.webp)
