The description and use of the sector, crosse-staffe, and other instruments : with a canon of artificiall Sines and Tangents, and the use thereof in astronomie, navigation, dialling and fortification .. (1636)
Gunter, Edmund, 1581-1626 · London : Printed by William Iones for Iames Bowler · leaf 54
other right-lined figure, it may berefolued into trianglesiand fo a fide of a fquare found equallto euery triangle; and thefe being reduced into one equal!fquare, it fhall be equall to the whole right-lined figure muen- To jittdc a proportion ktweve Superficiesj though theybe unlike one to the… … 3^ Let the Superficies given, be the oblonge ji> and the tri-angle 5. Fir ft between the vnequall fides of^,I flnde a meansproportionall, and note it in Q- this is the fide of a fquareequallunro A. Then betweene the perpendicular of B, andhalfe hisbafe,Iiindeameane proportionall, and note it inB…
Astronomy · Puritans
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