Practical plane and solid geometry for advanced students, including graphic statics, adapted to the requirements of the South Kensington syllabus (1899)
Harrison, Joseph, Baxandall, George Albert · London Macmillan · leaf 38
en angle POJV=3t.6°. (/) By means of a scale of chords. A scale of chordsmarked CHO is generally given on a rectangular protractor. With centre 0, radius o to 60, describe the arc PP. With centre P, radius o to 37.6, cut this arc in P. Join OP, then the angle POJV= 37.6°. 16. Problem.—An angle AOB… … 16 (a) Measure the angle directly with the protractor ■ (b) or measure PN and refer to the table of sines;if) or measure ON and refer to the table of cosines ;if) or measure QE and refer to the table of tangents;(e) or measure PE and refer to the table of chords ;if) or measure PE on the scale of…
