A course of practical geometry for mechanicsSimpkin and Marshall, 1843 - 68 páginas |
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Página 17
... Bisect , signifies to divide into two equal parts , and Trisect to divide into three equal parts . 60. To Produce or Prolong a straight line is to lengthen it in the same straight line . 61. A Generatrix is that by which something is ...
... Bisect , signifies to divide into two equal parts , and Trisect to divide into three equal parts . 60. To Produce or Prolong a straight line is to lengthen it in the same straight line . 61. A Generatrix is that by which something is ...
Página 19
... . Note 2. Where dimensions are given in inches , in the Examples for Practice , feet , or other magnitudes may be substituted if wanted . PROBLEMS . PROBLEM I. To bisect a given rectilineal angle PRACTICAL GEOMETRY . 19.
... . Note 2. Where dimensions are given in inches , in the Examples for Practice , feet , or other magnitudes may be substituted if wanted . PROBLEMS . PROBLEM I. To bisect a given rectilineal angle PRACTICAL GEOMETRY . 19.
Página 20
... bisecting line with the arc ; and if the distance agree with that from E to the same point of intersection , the diagram is correct . The process explained in this problem , will , with equal accuracy , bisect a curvilineal angle ...
... bisecting line with the arc ; and if the distance agree with that from E to the same point of intersection , the diagram is correct . The process explained in this problem , will , with equal accuracy , bisect a curvilineal angle ...
Página 21
William Pease. EXAMPLES FOR PRACTICE . 1. Draw an acute angle , and bisect it . 2. Draw an obtuse angle , and bisect it . PROBLEM II . At a given point in a given right line , to make an an- gle equal to a given rectilineal angle . 1 ...
William Pease. EXAMPLES FOR PRACTICE . 1. Draw an acute angle , and bisect it . 2. Draw an obtuse angle , and bisect it . PROBLEM II . At a given point in a given right line , to make an an- gle equal to a given rectilineal angle . 1 ...
Página 22
... bisect it by Prob . I. PROBLEM IV . Any angle being given , to find the number of degrees it contains . 1. Let G AB as in Prob . II . be the given angle . 2. From A as a centre , and with 60 degrees taken from any line of chords as a ...
... bisect it by Prob . I. PROBLEM IV . Any angle being given , to find the number of degrees it contains . 1. Let G AB as in Prob . II . be the given angle . 2. From A as a centre , and with 60 degrees taken from any line of chords as a ...
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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.