# An Elementary Geometry and Trigonometry

Thompson, Bigelow, and Brown, 1873 - Geometry - 238 pages
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### Contents

 ANGLES LINES POLYGONS 3 RATIO AND PROPORTION 25 THE CIRCLE 49 RELATIONS OF POLYGONS 61 PROBLEMS OF CONSTRUCTION 89 LOGARITHMS 1
 Explanation of Table of Logarithms 11 CHAPTER III 17 CHAPTER IV 29 PRACTICAL APPLICATIONS 53 2724 12 17 16

### Popular passages

Page 107 - To describe an isosceles triangle, having each of the angles at the base double of the third angle.
Page 25 - PROPORTION when the ratio of the first to the second is equal to the ratio of the second to the third.
Page 5 - If, at a point in a straight line, two other straight lines, upon the opposite sides of it, make the adjacent angles together equal to two right angles, these two straight lines shall be in one and the same straight line.
Page 11 - The circumference of every circle is supposed to be divided into 360 equal parts, called degrees ; each degree into 60 equal parts, called minutes ; and each minute into 60 equal parts, called seconds.
Page 43 - The perimeters of regular polygons of the same number of sides are to each other as the radii of the circumscribed circles...
Page 11 - If two triangles have two sides, and the included angle of the one equal to two sides and the included angle of the other, each to each, the two triangles are equal in all respects.
Page 96 - Upon a given straight line to describe a segment of a circle, which shall contain an angle equal to a given rectilineal angle.
Page 23 - If two triangles have two sides of one respectively equal to two sides of the other, and the angles contained by those sides supplementary, the triangles are equal in area.
Page 14 - DEF, having two sides and the included angle of the one equal to two sides and the included angle of the other, each to each, are themselves equal (Prop.
Page 70 - A right cylinder is a solid described by the revolution of a rectangle about one of its sides.