## Mechanical Drawing ... |

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### Common terms and phrases

base Bearing bottom bounded called capitals center line CHAPTER character circle combination connecting construct Copy curved cutting plane cylinder dashes diameter dimension lines directions distance Divide dotted lines draw arc edge employed equal equal spaces erasing extending EXTRA PLATE faces figure follow the order front view full lines give given line given point Group hand Head heavy lines height hexagon hole horizontal line illustrated inking intersecting Joint leave length letter light line A B line drawn locate lower margin lines measure necessary Note object Oblique lines order given Original parallel passing pencil perpendicular piece placed PLATE 12 position possible PROBLEM pulley radius rectangle relation represented right angle scale sectional view semicircle sheet short shown in Fig side view spaces square straight line surface tangent three views top view triangle upper vertical line width

### Popular passages

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 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 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 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.