The svrveyor in foure bookes / By Aaron Rathborne.

  • Aaron Rathborne
Date:
1616
Catalogue details

Licence: Public Domain Mark

Credit: The svrveyor in foure bookes / By Aaron Rathborne. Source: Wellcome Collection.

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    P A RT.'2 The Surueyor. The fecond Part. () F the making and defcription of all forts of fuperficiall figures, with their feuerall and particular menfurations, PROBLEME XXXV, To make an equilater triangle, the fide thereof being ginen. EWC. 36 ftance A. B. fetting one foot in A. ftrike anarche line towards D.and atthe fame diftance with one foot in B. crofle the fame arche linein D: and from the in- terfection draw thelines D. A. and D. B. which with the given line A. B. thall make the equilater triangle A.B.D.as was required. Dez F. 21. Pros. 36¢ PROBLEME XXXVI. To find the perpendicular of an equilater triangle Arithmetically,the fide cing given, By this Prob, the perpendi- cular of an N the former Diagram let the fide be ginen 8. It is required to find the. | perpendicular. Square the fide 8: makes 64. then fquare the halfe bafe, Hofceles is 4. makes 16. which dedudt from 64. refts 48. whofe f{quare roote “1% . Nowe ay 48. neere rational] 6.,2. is the length ofthe perpendicular D C. ‘required. bemggiuen, LHEOR. 6.19. 290: Sahotenr tahonal 0 Li jael, 2 XOR Agee PROBLEME XXXVIL The perpendicular and fide of anequilater triangle being ginen, to finde the Area or {uperficiall content. | N the former Diagram the perpendicular 4¥. 48, and the fide 8. is gi- _uen, andthe Area ts required , Multipliethe whole of eyther by halfe, the other as v.48. by 4. the productis v5 .768. necrerationall, 27.2%. the fuperficiall content required. Turon. 24. Or —. »— .
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