Linear Drawing: Showing the Application of Practical Geometry to Trade and ManufacturesCassell, Petter, Galpin, & Company, 1869 - 118 páginas |
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Página 5
... A B C D will be a square . * In a square , all the four sides must be equal , and all the angles must be right angles . If both these conditions be fulfilled , both the diagonals will be equal . Diagonals are lines crossing to opposite ...
... A B C D will be a square . * In a square , all the four sides must be equal , and all the angles must be right angles . If both these conditions be fulfilled , both the diagonals will be equal . Diagonals are lines crossing to opposite ...
Página 23
... circle . The parts into which the circle is thus divided are called segments . A part of a circle contained between two radii , as D O E , in Fig . 34 , is called a sector . с From their extremities draw lines A B C D , LINEAR DRAWING . 23.
... circle . The parts into which the circle is thus divided are called segments . A part of a circle contained between two radii , as D O E , in Fig . 34 , is called a sector . с From their extremities draw lines A B C D , LINEAR DRAWING . 23.
Página 24
... A B C D , which will form the square in the circle . To construct a Gothic Quatrefoil . * ( Fig . 35. ) n H B Fig . 35 . Construct a square on the diagonal A B ( Fig . 29 ) . Bisect the sides by the lines E G , F H , cutting the lines ...
... A B C D , which will form the square in the circle . To construct a Gothic Quatrefoil . * ( Fig . 35. ) n H B Fig . 35 . Construct a square on the diagonal A B ( Fig . 29 ) . Bisect the sides by the lines E G , F H , cutting the lines ...
Página 26
... A B C D , of which the adjacent sides are equal . ( Fig . 38. ) C Fig . 38 . Draw the diagonal A B , which will bisect the angle CB D , or C A D. Bisect the angle A D B. Produce the bisecting line until it cuts A B in O. Then O is the ...
... A B C D , of which the adjacent sides are equal . ( Fig . 38. ) C Fig . 38 . Draw the diagonal A B , which will bisect the angle CB D , or C A D. Bisect the angle A D B. Produce the bisecting line until it cuts A B in O. Then O is the ...
Página 34
... A B C D , to inscribe the largest Equilateral Triangle it will contain . ( Fig . 47. ) Trisect the right angle D A B. Bisect the angles E A F and G A H by the lines A I and A J. Join IJ . Then— AIJ is the largest equilateral triangle ...
... A B C D , to inscribe the largest Equilateral Triangle it will contain . ( Fig . 47. ) Trisect the right angle D A B. Bisect the angles E A F and G A H by the lines A I and A J. Join IJ . Then— AIJ is the largest equilateral triangle ...
Términos y frases comunes
A B and C D angle similar Bisect the angle bisecting line centre circle cutting complete the figure complete the square construct a Square construct a Triangle cutting C D cutting the circle cutting the lines cutting the perpendicular Cycloid describe a circle describe a semicircle describe an arc describe arcs cutting describe the arc diameters A B draw a line Draw E F draw lines drawn ellipse Epicycloid equal in area equilateral triangle erect a perpendicular F and G given circle given line H Draw heptagon Hypocycloid I J K intersecting Involute Isosceles Triangle Join these points length line A B line parallel number of equal octagon parallel to A B parallelogram polygon produce the bisecting quadrant radius A B radius O A rectangle regular Hexagon right angles straight line tangent Trapezium voussoirs wheel has moved
Pasajes populares
Página 101 - In any right-angled triangle, the square which is described upon the side subtending the right angle, is equal to the squares described upon the sides which contain the right angle.
Página 17 - Most good practical workmen have several means for getting the cut of the mitre, and to them this demonstration will appear unnecessary, but I have seen many men make sad blunders, for want of knowing this simple rule. PROBLEM 12.
Página 43 - AB of the circle into as many equal parts as the polygon is to have sides. With the points A and B as centers and radius AB, describe arcs cutting each other at C.
Página 85 - The process is then continued from the inner squares. THE INVOLUTE (Fig. 61). If a perfectly flexible line is supposed to be wound round any curve, so as to coincide with it, and kept stretched as it is gradually unwound, the end of, or any point in the line will describe or trace another curve, called the involute of the curve — being in reality the opening out, or tmrolKnff, of the periphery of the first curved surface.
Página 12 - Set off these lengths on the pitch circle.* To construct an equilateral triangle on the given line AB (Fig. 5). From A, with radius AB, describe an arc. From B, with the same radius, describe a corresponding arc, cutting the former one in c. Lines joining A c and B c will complete the triangle, which will be equilateral, that is, all its sides will be equal. A triangle having only two of its sides equal, is called an isosceles triangle (A).