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, Part 1 |
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Common terms and phrases
APPLICATION base bisect centre circle cutting COLENSO'S comparative compasses completed Construct a scale containing corresponding cutting cutting M N describe a circle describe the circle determine diagonal scale difference divided Draw drawn ELEMENTARY ELEMENTS English English miles English yards equal evident Examples Exercises feet figure GEOMETRICAL GEOMETRY given angle given line given points given straight line greater horizontal inches long intersecting Join length less Let M N Pl line M N London manner marked means measure meet method middle miles military octagon parallel passing perpendicular perpendicular to M N PRACTICAL primary division principle PROBLEM proportional radius Reduce regular representative fraction required Euc respectively right angle ruler Schools sector shown sides similar square STUDENTS Subdivide toises touch transverse distance triangle unit vernier vertical yards
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Page 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...
Page 18 - To describe a parallelogram equal to a given triangle, and having an angle equal to a given angle.
Page 8 - Upon a given straight line to describe a segment of a circle, which shall contain an angle equal to a given rectilineal angle.
Page 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