A course of practical geometry for mechanicsSimpkin and Marshall, 1843 - 68 páginas |
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Página 5
... necessary . The notes and definitions , printed in small type , need only be read so that their sense may be clearly understood . I. A POINT is that which hath no parts , or which hath no magnitude . A point has also been defined , as ...
... necessary . The notes and definitions , printed in small type , need only be read so that their sense may be clearly understood . I. A POINT is that which hath no parts , or which hath no magnitude . A point has also been defined , as ...
Página 6
... necessary , because young students are fre- quently at a loss to know the practical meaning of the pre- ceding definitions . Most of those here given , apply literally only to Theoretical Geometry , for the eye and hand of a draughtsman ...
... necessary , because young students are fre- quently at a loss to know the practical meaning of the pre- ceding definitions . Most of those here given , apply literally only to Theoretical Geometry , for the eye and hand of a draughtsman ...
Página 19
... necessary . They may be compared to a scaffold , which is to be removed when the building is finished . They are , however , suffered to remain dotted in geometrical figures , to guide the student . Note 1. The lines forming the figures ...
... necessary . They may be compared to a scaffold , which is to be removed when the building is finished . They are , however , suffered to remain dotted in geometrical figures , to guide the student . Note 1. The lines forming the figures ...
Página 22
... necessary ) in G and F. 3. Apply the distance from G to F on the same line of chords , and the number of degrees thus measured will be the content of the angle G A B. 4. If the arc G F contain more than 90 degrees refer to the note in ...
... necessary ) in G and F. 3. Apply the distance from G to F on the same line of chords , and the number of degrees thus measured will be the content of the angle G A B. 4. If the arc G F contain more than 90 degrees refer to the note in ...
Página 23
... necessary ) will be seen to coin- cide with the exact number of degrees ( marked on the upper edge or ends of the protractor ) which the angle E CD is known to contain . EXAMPLES . 1. Make an angle that shall contain 90 degrees . 2 ...
... necessary ) will be seen to coin- cide with the exact number of degrees ( marked on the upper edge or ends of the protractor ) which the angle E CD is known to contain . EXAMPLES . 1. Make an angle that shall contain 90 degrees . 2 ...
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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.