Elementary Mechanical Drawing: Theory and Practice, with Chapters on Geometrical Drawing, Mensuration and Reproduction of Drawings; a Text-book for Technical, Normal, Secondary, Trade and Vocational Schools

McGraw-Hill, 1925 - 251 σελίδες

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Δημοφιλή αποσπάσματα

Σελίδα 187 - Draw two diameters AB and CD at right angles to each other. Bisect the radius eB.
Σελίδα 215 - Angle. An obtuse angle is greater than a right angle and less than two right angles.
Σελίδα 207 - ... possible ways to define the circumference of a circle. Statically, the circumference of a circle can be defined as the locus of all points in a plane a given distance from some point in the plane which we designate as the center. On the other hand, we could define the circumference kinematically as the curve generated by a point moving in a plane in such a way that it is always the same distance from some point in the plane designated as the center and it returns to the position of departure....
Σελίδα 210 - One of the conic sections, being a curve formed by the intersection of the surface of a cone with a plane parallel to one of its sides.
Σελίδα 227 - Example. — -Find the length of the arc of a circle when R = 9 inches and N — 74 degrees. Thus, L = .0174RN = .0174 X 9 X 74 = 11.58 inches. Example. — Find the length of the arc of a circle whose radius is 7.5 inches and the number of degrees subtended by the arc is 67° 15'.
Σελίδα 215 - Thus when it is said that the sum of the three angles of any triangle is equal to two right angles, this is a theorem, the truth of which is demonstrated by Geometry.
Σελίδα 233 - The volume of a spherical pyramid is equal to the area of its base multiplied by one-third the radius of the sphere.
Σελίδα 233 - The lateral area of a frustum of a regular pyramid is equal to one-half the sum of the perimeters of its bases, multiplied by...
Σελίδα 179 - To Draw a Line Perpendicular to a Given Line from a Point on the Line, or Outside the Line.
Σελίδα 34 - In the same manner the circumference of a circle may be divided into any number of equal spaces, FIG.

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