Elementary Geometrical Drawing: Part I. Including Practical Plane Geometry; the Construction of Scales; the Use of the Sector, the Marquois Scales, and the Protractor. Designed for the Use of Students Preparing for the Military Examinations, Deel 1Longman, Green, Longman, and Roberts, 1861 - 42 pagina's |
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Elementary Geometrical Drawing: Including Practical Plane Geometry ..., Volume 1 Samuel H. WINTER Volledige weergave - 1861 |
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A B C D E F archines Beam Compass centre circle cutting Construct a scale corresponding scale cutting M N describe a circle describe two circles diagonal scale Divide a line divide a straight Draw a line Draw a scale draw a straight draw M Q ELEMENTS of ALGEBRA English feet English miles English yards equilateral triangle EXAMPLES FOR PRACTICE furlongs given angle given circle given line given points given straight line heptagon horizontal intersecting isosceles triangle length of scale Let M N Pl Let the scale line M N line of chords line of lines M N Euc MARQUOIS SCALES measure feet mètres military number of inches P Q R perpendicular to M N PLANE GEOMETRY primary division PROBLEM PROTRACTOR radius representative fraction required Euc right angle ruler scale of English sector square toises transverse distance vernier scale versts vertical Woolwich Papers
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Pagina 13 - PROBLEM. From two given points on the same side of a straight line given in position, draw two straight lines which shall meet in that line, and make equal angles with it ; also prove, that the sum of these two lines is less than the sum of any other two lines drawn to any other point in the line. Analysis. Let A, B be the two given points, and CD the given line. Suppose G the required point in the line, such that AG and BG being joined, the angle...
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Pagina 18 - To describe a parallelogram equal to a given triangle, and having an angle equal to a given angle.
Pagina 8 - Upon a given straight line to describe a segment of a circle, which shall contain an angle equal to a given rectilineal angle.
Pagina 24 - Tojind a fourth proportional to three given straight lines. Let A, B, C be the three given straight lines. It is required to find a fourth proportional to A, B, C. Take two straight lines DE, DF, containing any angle EDF: and upon these make DG equal to A, GE equal to B, and DH equal to C