A course of practical geometry for mechanicsSimpkin and Marshall, 1843 - 68 páginas |
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Página 3
... true , that geometry took its birth from the annual overflowing of the Nile , and the consequent re - measurement of land ; the term applied to this process was literally correct . Geometry in some shape existed in the earliest ages of ...
... true , that geometry took its birth from the annual overflowing of the Nile , and the consequent re - measurement of land ; the term applied to this process was literally correct . Geometry in some shape existed in the earliest ages of ...
Página 6
... true points of intersection , cannot be decided upon . These remarks may at first sight appear to be pre- mature ; as the student in this stage of his work , is sup- posed not to have used his drawing instruments ; but the cautions are ...
... true points of intersection , cannot be decided upon . These remarks may at first sight appear to be pre- mature ; as the student in this stage of his work , is sup- posed not to have used his drawing instruments ; but the cautions are ...
Página 7
... true position ; but this is never forgotten either by the experienced draughts- man , or the judicious connoisseur . 4. A vertical line is that which presents the greatest contrast possible to a horizontal line , being always ...
... true position ; but this is never forgotten either by the experienced draughts- man , or the judicious connoisseur . 4. A vertical line is that which presents the greatest contrast possible to a horizontal line , being always ...
Página 28
... true condition , renders it of little service where great accuracy is required . PROBLEM XIV . To make a rectangle of a given length and breadth . 1. Let AB be the length , and EO the breadth given . 2. At the extremities of the line AB ...
... true condition , renders it of little service where great accuracy is required . PROBLEM XIV . To make a rectangle of a given length and breadth . 1. Let AB be the length , and EO the breadth given . 2. At the extremities of the line AB ...
Página 34
... true curve of the whole arc AC B. For let AC be bisected by a perpendicular ; bisect the angle TAC by a line drawn from A cutting the perpendicular , and this point of intersection will give the rise between A and C. Proceed in this way ...
... true curve of the whole arc AC B. For let AC be bisected by a perpendicular ; bisect the angle TAC by a line drawn from A cutting the perpendicular , and this point of intersection will give the rise between A and C. Proceed in this way ...
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Términos y frases comunes
60 degrees altitude angle equal arc or angle Bisect called centre chords shall form circumference curvilineal cutting A B decagon describe a circle describe a regular describe an arc describe arcs cutting diagonals diameter dodecagon Draw a line Draw chords draw lines Draw the line ellipse equilateral triangle Euclid Euclid's Elements EXAMPLE generatrix geometry given angle given circle given line given point given right line given triangle gonals heptagon inches long inscribe isosceles triangle Join length Let A B line 2 inches line A B line parallel LVIII number of degrees number of equal parallel ruler parallelogram pentagon perpendicular plane point of intersection protractor radii radius ratio rectangle regular nonagon regular polygon rhombus right angles right-angled triangle segment square equal straight line superficies tangent trapezium triangle being given triangle equal triangle required vertex vertical angle Vide Def vide Prob
Pasajes populares
Página 8 - A plane rectilineal angle is the inclination of two straight lines to one another, -which meet together, but are not in the same straight line.
Página 10 - A diameter of a circle is a straight line drawn through the centre, and terminated both ways by the circumference.
Página 9 - CHG; and they are adjacent angles; but when a straight line standing on another straight line makes the adjacent angles equal to one another...
Página 9 - A circle is a plane figure contained by one line, which is called the circumference, and is such, that all straight lines drawn from a certain point within the figure to the circumference are equal to one another.
Página 13 - Of four-sided figures, a SQUARE is that which has all its sides equal, and all its angles right angles.
Página 9 - 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.
Página 14 - Parallel straight lines are such as are in the same plane, and which being produced ever so far both ways, do not meet.
Página 8 - A plane angle is the inclination of two lines to one another* in a plane, which meet together, but are not in the same direction.
Página 13 - A rhomboid, is that which has its opposite sides equal to one another, but all its sides are not equal, nor its angles right angles.
Página 8 - DBC, or CBD ; but, if there be only one angle at a point, it may be expressed by a letter placed at that point ; as the angle at E.