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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    ——EE—— arch wanteth of a Semicircle, or of 180 degrees, | S the arch H.K..B.D.isan arch leffe then a Semicircle,and containeth A 130 degrees,and the Complement thereof to a Semicircle,is the arch H.G, 50 degrees , whichis fo muchas the arch H. K.B. D. wanteth of a Semicircle, or of 180 degrees. The Complements of A ngles areas the Complements of Arches, A S the arch K. B. isthe complement of the arch B. D.to a Quadrant, and the arch B. D. of the arch K.B. So theang!eK.A.B. 40 degrees is the complement to a right angle of the Angle B.A.D. 50 depreess and likewife the fame angle B. A. D. of the fameangle K:A.B. And in this {ence is the third angle of any Triangle {aid to be the complement of the other two,to two right angles,or a Semicircle: Fot the three angles.of' any Triangle are equall to two right angles; as is here- after declared. 7 f. *
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