Science and art drawing : complete geometrical course ; consisting of plane and solid geometry, orthographic and isometric projection, projection of shadow's the principles of map projection, graphic arithmetic and graphic statics (1895)
Spanton, J. Humphrey (John Humphrey) · London : Macmillan · leaf 159
On an arc Ih inches in radius, to construct an angle o/ 125°. Make the transverse distance between the points 60 and 601| inches. Let AB (Fig. 266) represent this distance. Describean arc with AB as radius. Take the distance between the … points 50 and 50 from the sector, and set it off on the arc fromB to C. Also take the distance from 40 to 40, and set it offfrom C to D. Then take the distance between 35 and 35, andset it off from D to E. Join EA. Then the angle BAE will be125°. 50°+ 40°+ 35° = 125°. XI INSTRUMENTS FOR MEASURING…
Geometrical drawing
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