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### Contents

 CHAPTER PAGE I MATERIAL 1 PREPARATION AND USE OF MATERIAL 7 LAYING OUT THE SHEET 10 USE OF INSTRUMENTS 15 USE OF TRIANGLES 24 WORKING DRAWINGS 31 OBJECTS WITH OBLIQUE RFACES 53 ASSEMBLY DRAWINGS 66
 SCALED DRAWINGS 110 SECTIONAL VIEWS 119 PARTIAL SECTIONS 135 APPENDIX 151 LETTERING 153 GEOMETRICAL DEFINITIONS 165 GEOMETRICAL PROBLEMS 180 GEOMETRICAL EXERCISES 196

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Page 159 - An oblique prism is a prism whose lateral edges are not perpendicular to the planes of the bases.
Page 156 - A circle is a plane figure bounded by a curved line, called the circumference, every point of which is equally distant from a point within called the center.
Page 160 - A regular pyramid is a pyramid whose base is a regular polygon, the center of which coincides with the foot of the altitude.
Page 163 - A sphere is a solid bounded by a curved surface, every point of which is equally distant from a point within called the center. The radius of a sphere is a straight line drawn from the center to the surface.
Page 175 - To draw an arc of a given radius tangent to a given line and arc — Let AB be the given radius, CD the given line and EHS the given arc.
Page 162 - ... lines, parts, and masses of a subject. Concave. Curving inwardly. Cone. A solid bounded by a plane surface called the base, which is a circle, ellipse, or other curved figure, and by a lateral surface which is everywhere curved, and tapers to a point called the vertex. Its base names the cone. Thus a circular cone is one whose base is a circle. A RIGHT CIRCULAR CONE is generated by an isosceles triangle which revolves about its altitude as an axis. The equal sides of the triangle in any position...
Page 153 - The angle opposite the base is known as the vertical angle, and the vertex of this angle is called the vertex of the triangle. The altitude of a triangle is the perpendicular distance from the vertex to the base or the base produced.
Page 168 - At a given point in a given straight line, to construct an angle equal to a given angle. Let A be the given point in the straight line AB, and O the given angle.
Page 155 - A TRAPEZOID is a quadrilateral which has only two of its sides parallel ; as the quadrilateral RST U.
Page 156 - The radius of a circle is a straight line drawn from the center to the circumference, and is equal to one-half the diameter.