A course of geometrical drawing |
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Results 1-5 of 17
Page 7
... perpen- dicular drawn through 2 . Let it be required to take off 1.79 inches . This is shown by the third dots . Place one leg of the dividers at the point where the horizontal drawn through 9 , in a c , intersects the diagonal drawn ...
... perpen- dicular drawn through 2 . Let it be required to take off 1.79 inches . This is shown by the third dots . Place one leg of the dividers at the point where the horizontal drawn through 9 , in a c , intersects the diagonal drawn ...
Page 34
... perpen- dicular to a c ; the angle A B C will contain 40 ° . The same result will be obtained by making the angle ABC equal 40 ° , and drawing from A , A C perpendicular to в C. A C PROBLEM 21 . On a given straight line , to describe an ...
... perpen- dicular to a c ; the angle A B C will contain 40 ° . The same result will be obtained by making the angle ABC equal 40 ° , and drawing from A , A C perpendicular to в C. A C PROBLEM 21 . On a given straight line , to describe an ...
Page 35
... perpen- dicular to any of the sides of the triangle . From centre a , and radius a b , describe a circle ; this circle will be inscribed in the triangle . PROBLEM 23 . Through the points of division of a given divided line , to draw ...
... perpen- dicular to any of the sides of the triangle . From centre a , and radius a b , describe a circle ; this circle will be inscribed in the triangle . PROBLEM 23 . Through the points of division of a given divided line , to draw ...
Page 38
... perpen- dicular to A B , cutting the semi- circle in D. Then , by Prob . 12 , VACXCB = CD = V1X + = V7 . From the above , it will be readily seen how to determine a line which shall represent v TRANSFORMATION OR REDUCTION OF PLANE ...
... perpen- dicular to A B , cutting the semi- circle in D. Then , by Prob . 12 , VACXCB = CD = V1X + = V7 . From the above , it will be readily seen how to determine a line which shall represent v TRANSFORMATION OR REDUCTION OF PLANE ...
Page 34
... perpen- dicular to A c ; the angle A B C will contain 40 ° . The same result will be obtained by making the angle ABC equal 40 ° , and drawing from A , A C perpendicular to в C. C PROBLEM 21 . On a given straight line , to describe an ...
... perpen- dicular to A c ; the angle A B C will contain 40 ° . The same result will be obtained by making the angle ABC equal 40 ° , and drawing from A , A C perpendicular to в C. C PROBLEM 21 . On a given straight line , to describe an ...
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Common terms and phrases
A B C D angle a b c angle B A C angle contained angles to B L base Bisect chord cone conical surface cutting A B describe a circle describe an arc diameter dicular dihedral angle draw a line Draw the plan ellipse feet fourth proportional furlongs geometrical given angle given circle given line given point given straight line hori horizontal distances horizontal plane horizontal trace inches long inclined at 40 isosceles triangle Join a b Let A B C line A B line joining lines drawn mean proportional number of sides parallel to B L pentagon perpen perpendicular to A B plane containing plane inclined plane of projection polygon primary division Prob PROBLEM real length rectangle representative fraction required plane right angles right-angled triangle sector shown square equal tangent transverse distance vertical plane vertical projection vertical trace yards zontal
Popular passages
Page 2 - When a straight line standing on another straight line makes the adjacent angles equal to one another, each of the angles is called a right angle; and the straight line which stands on the other is called a perpendicular to it.
Page 12 - Through a given point to draw a line parallel to a given straight line. Let C be the given point, and AB the given line.
Page 4 - Circle is a plane figure bounded by one uniformly curved line, bed (Fig. 16), called the circumference, every part of which is equally distant from a point within it, called the centre, as a.
Page 4 - Hexagon, of six sides; a Heptagon, seven; an Octagon, eight; a Nonagon, nine ; a Decagon, ten ; an Undecagon, eleven ; and a Dodecagon, twelve sides.
Page 23 - All the interior angles of any rectilineal figure, together with four right angles, are equal to twice as many right angles as the figure has sidef. For any rectilineal figure ABCDE can be divided into as many triangles as the figure has sides, by drawing straight lines from a point F within the figure to each of its angles.
Page 23 - A as a centre and radius equal to the sum of the radii of the given circles ; and continue as before, except that BE and AD will now be on opposite sides of AB. The two straight lines which are thus drawn to touch the two given circles can be shewn to intersect AB at the same point. 5. To describe a circle which shall pass through three • given points not in the same straight line. This is solved in Euclid IV. 5. 6. To describe a circle...
Page 29 - Upon a given straight line to describe a segment of a circle, which shall contain an angle equal to a given rectilineal angle.
Page 32 - The projection of a line upon a plane is the locus of the projections of all points of the line upou the plane.
Page 48 - ... quarter of an inch in depth at several times, allowing sufficient intervals for the fluid to stain the stone in that plane, 4, 3, 2, 1, it has fallen to at the last abstraction. These stains will present a series of horizontal lines or contours, 4, 3, 2, 1, all round the surface of the stone ; and if we examine the stone thus prepared, looking down upon the top, we shall see that the steepness and REPRESENTATION OF THE GROUND.
Page 57 - IF two parallel planes be cut by another plane, their common sections with it are parallels.* Let the parallel planes AB, CD be cut by the plane EFHG, and let their common sections with it be EF, GH ; EF is parallel to GH.