A course of practical geometry for mechanicsSimpkin and Marshall, 1843 - 68 páginas |
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Página 10
... divides a sphere into two equal parts ; as the equator , ecliptic , or meridian , on a geographical globe . 15. A line ... divide the circum- ference of any circle , into 360 equal parts , which are named degrees ; if therefore , one of ...
... divides a sphere into two equal parts ; as the equator , ecliptic , or meridian , on a geographical globe . 15. A line ... divide the circum- ference of any circle , into 360 equal parts , which are named degrees ; if therefore , one of ...
Página 16
... divide it into any number of parts , each equal to the said measure . 57. To Transform a figure , is to change it into another figure of the same superficial or solid content ; thus , if a square be made equal in area to a given ...
... divide it into any number of parts , each equal to the said measure . 57. To Transform a figure , is to change it into another figure of the same superficial or solid content ; thus , if a square be made equal in area to a given ...
Página 17
... 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 generated ; thus , 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 generated ; thus , to ...
Página 18
... divide it , by repeated trials , into two , three , or four equal parts , so that the eye may become accustomed to judge of equal distances ; for although Problems are provided for such cases , yet instances often occur in which ...
... divide it , by repeated trials , into two , three , or four equal parts , so that the eye may become accustomed to judge of equal distances ; for although Problems are provided for such cases , yet instances often occur in which ...
Página 29
... Divide a line 2 inches long into 6 equal parts . 2. Find the ninth part of a line 3 inches long . PROBLEM XVI . To divide a line into any number of equal or propor- tional parts . 1. Let A B , Prob . XV . , be the given line . 2. Draw a ...
... Divide a line 2 inches long into 6 equal parts . 2. Find the ninth part of a line 3 inches long . PROBLEM XVI . To divide a line into any number of equal or propor- tional parts . 1. Let A B , Prob . XV . , be the given line . 2. Draw 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.