A Treatise on Mensuration: Both in Theory and PracticeSaint, 1770 - 646 pages |
From inside the book
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Page 10
... angle required . Note , If the angle exceed 90 degrees take the ex- tent of half the number of degrees and turn the compaffes twice over upon the arc from B to C. PROBLEM IX . To make a regular figure of any given number of fides , each ...
... angle required . Note , If the angle exceed 90 degrees take the ex- tent of half the number of degrees and turn the compaffes twice over upon the arc from B to C. PROBLEM IX . To make a regular figure of any given number of fides , each ...
Page 11
... angle of the polygon , from each end of AB draw lines AO , BO , making angles with the given line equal to half the an- gle of the polygon . Then with the center and ra- D dius OA defcribe a circle , in the circumference of which apply ...
... angle of the polygon , from each end of AB draw lines AO , BO , making angles with the given line equal to half the an- gle of the polygon . Then with the center and ra- D dius OA defcribe a circle , in the circumference of which apply ...
Page 13
... angles of triangles are measured by the num- ber of degrees contained in the arc cut off by the legs of the angle , and whofe center is the angular point . - A right angle is an angle of 90 degrees.— D The The fum of the three angles of ...
... angles of triangles are measured by the num- ber of degrees contained in the arc cut off by the legs of the angle , and whofe center is the angular point . - A right angle is an angle of 90 degrees.— D The The fum of the three angles of ...
Page 14
... angles , or 180 ' .- Wherefore in a right- angled triangle , the one acute angle being fubtracted from 90 ° , the remainder will be the other ; and the fum of any two angles of a triangle being taken from 180 ° , will leave the third angle ...
... angles , or 180 ' .- Wherefore in a right- angled triangle , the one acute angle being fubtracted from 90 ° , the remainder will be the other ; and the fum of any two angles of a triangle being taken from 180 ° , will leave the third angle ...
Page 15
... angle is measured . The fines , tangents , & c . of every degree and mi- nute in a quadrant are calculated to an ... angle . 2. When there are given two fides and their in- cluded angle . 3. When the three fides are given . When the ...
... angle is measured . The fines , tangents , & c . of every degree and mi- nute in a quadrant are calculated to an ... angle . 2. When there are given two fides and their in- cluded angle . 3. When the three fides are given . When the ...
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Common terms and phrases
abfciffa againſt alfo Alnwick alſo altitude angle area Verf bafe baſe becauſe breadth bung cafe cafk circle whofe circumference cofine cone confequently conftruction conjugate COROLLARY defcribe difference dimenfions diſtance ditto divided divifion ellipfe equal expreffed expreffion faid fame example fecond fection feet fegment feries fhall fide figure fimilar fince find the area firſt fixed axe fluxion folid fome fpheroid fpindle fquare fruftum fubtract fuch fuppofing furface gallons girt greateſt half head diameter hence hoof hyperbola inches interfecting laft laſt laſt problem lefs length meaſure method middle moſt multiply muſt Newcaſtle oppofite ordinate parabola paraboloid parallel perpendicular plane prob quotient radius rule Schoolmafter ſhall Sliding Rule ſphere ſquare ſtation tangent theſe thickneſs thofe thoſe tranfverfe trapezium triangle uſed vertex Wherefore whofe whofe height whole whoſe zone ΙΟ