First Practical Lines of Geometrical Drawing ...Williams and Norgate, 1865 - 169 páginas |
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Página 4
... given point , so that its lower edge coincides with the given base ; determine the re- quired angle with a finely pointed pencil , and through that obtained point draw a line from the original one . PRACTICE . 1. On a base AB , two ...
... given point , so that its lower edge coincides with the given base ; determine the re- quired angle with a finely pointed pencil , and through that obtained point draw a line from the original one . PRACTICE . 1. On a base AB , two ...
Página 6
... line ( thick ) at th of an inch below and parallel to the first , and number it as in the given example . So far the scale of 10 units to one inch will be completed . All plain scales are constructed according to the same principle ...
... line ( thick ) at th of an inch below and parallel to the first , and number it as in the given example . So far the scale of 10 units to one inch will be completed . All plain scales are constructed according to the same principle ...
Página 8
J. F. H. de Rheims. divisions separated by vertical lines . Subdivide the lower line of the left hand primary division into 10 equal and secondary parts - from the first left hand subdivision of which draw a diagonal line ... given of 100 to ...
J. F. H. de Rheims. divisions separated by vertical lines . Subdivide the lower line of the left hand primary division into 10 equal and secondary parts - from the first left hand subdivision of which draw a diagonal line ... given of 100 to ...
Página 9
... lines acting in pairs , and divided so as to obtain certain dimensions according to given ratios . ( Euclid 2 , VI . book . ) The three principal pairs of lines contained by the sector are , The lines marked L , or lines of lines ...
... lines acting in pairs , and divided so as to obtain certain dimensions according to given ratios . ( Euclid 2 , VI . book . ) The three principal pairs of lines contained by the sector are , The lines marked L , or lines of lines ...
Página 10
... line 2 inches long into 10 equal parts . Take the given length ( 2 inches ) in the compass , and adapt the sector to it at the denomination required ; then open the sector so that the transverse distance 10-10 , equals two inches . It ...
... line 2 inches long into 10 equal parts . Take the given length ( 2 inches ) in the compass , and adapt the sector to it at the denomination required ; then open the sector so that the transverse distance 10-10 , equals two inches . It ...
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Términos y frases comunes
altitude angle of 30 angle of 45 axis base bisect centre circumference compass cone Construct a scale contours cube cylinder describe a circle describe the arc Descriptive Geometry determine the position diagonal scales diameter dihedral angle divided draw a line ellipse equal feet long forming an angle furlongs given line given point ground line height horizontal plane horizontal projection horizontal trace inch side inches edge inches high inches long isometric isometric projection join length miles oblique obtained parallel to x y parallelogram pendicular pentagon pentagonal pyramid perpendicular to x y perspective picture plane plane inclined planes of projection polygon primary division prism protractor pyramid radius ray of light representative fraction rhombus right angles sector shadow slope space square square pyramid straight line tangent tical tion versts vertical plane vertical projection vertical trace
Pasajes populares
Página 5 - If a side of any triangle be produced, the exterior angle is equal to the two interior and opposite angles ; and the three interior angles of every triangle are equal to two right angles.
Página 6 - If a straight line drawn through the centre of a circle bisect a straight line in it which does not pass through the centre, it shall cut it at right angles : and if it cut it at right angles, it shall bisect it.
Página 5 - 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 5 - If a straight line fall on two parallel straight lines, it makes the alternate angles equal to one another, and the exterior angle equal to the interior and opposite angle on the same side; and also the two interior angles on the same side together equal to two right angles.
Página 6 - IF a straight line be drawn parallel to one of the sides of a triangle, it shall cut the other sides, or those produced, proportionally; and if the sides, or the sides produced, be cut proportionally, the straight line which joins the points of section shall be parallel to the remaining side of the triangle...
Página 57 - A cone is a solid figure described by the revolution of a right-angled triangle about one of the sides containing the right angle, which side remains fixed.
Página 57 - A prism is a solid figure contained by plane figures, of which two that are opposite are equal, similar, and parallel to one another ; and the others parallelograms. XIV. A sphere is a solid figure described by the revolution of a semicircle about its diameter, which remains unmoved.
Página 58 - The base of .a cone is the circle described by that side containing the right angle which revolves.
Página 6 - In equal circles, angles, whether at the centres or circumferences, have the same ratio which the circumferences on which they stand have to one another ; so also have the sectors.
Página 5 - TRIANGLES upon the same base, and between the same parallels, are equal to one another.