A course of practical geometry for mechanicsSimpkin and Marshall, 1843 - 68 sider |
Inni boken
Resultat 1-5 av 10
Side 6
... obtain points ; if , therefore , the lines themselves are thick , the true points of intersection , cannot be ... obtained , if the student will fix in his mind a high standard of truth , and the first step to this attainment , is ...
... obtain points ; if , therefore , the lines themselves are thick , the true points of intersection , cannot be ... obtained , if the student will fix in his mind a high standard of truth , and the first step to this attainment , is ...
Side 18
... obtain these , application should be made to a respectable maker . Good second - hand instruments are sometimes to be met with at a cheap rate ; but the novice should never purchase any , except at the recom- mendation of a competent ...
... obtain these , application should be made to a respectable maker . Good second - hand instruments are sometimes to be met with at a cheap rate ; but the novice should never purchase any , except at the recom- mendation of a competent ...
Side 19
... obtain the second from the first , certain means must be employed ; these are called lines of construction , and are always to be dotted . Dotted lines are employed for three purposes ; first , to show the shape of those parts in solids ...
... obtain the second from the first , certain means must be employed ; these are called lines of construction , and are always to be dotted . Dotted lines are employed for three purposes ; first , to show the shape of those parts in solids ...
Side 27
... obtained by using a less radius than E A , and describing arcs cutting each other somewhere between A and the line BC . PROBLEM XIII . To let fall a perpendicular to a given line , from a point known to be nearly opposite the end of the ...
... obtained by using a less radius than E A , and describing arcs cutting each other somewhere between A and the line BC . PROBLEM XIII . To let fall a perpendicular to a given line , from a point known to be nearly opposite the end of the ...
Side 30
... obtain one foot let any quantity be assumed as a foot , and applied 9 times from A on the line AD , add half a foot more , and by joining the half foot to B , and drawing parallels as be- fore , A B will be divided into 9 equal parts ...
... obtain one foot let any quantity be assumed as a foot , and applied 9 times from A on the line AD , add half a foot more , and by joining the half foot to B , and drawing parallels as be- fore , A B will be divided into 9 equal parts ...
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Vanlige uttrykk og setninger
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
Populære avsnitt
Side 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.
Side 10 - A diameter of a circle is a straight line drawn through the centre, and terminated both ways by the circumference.
Side 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...
Side 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.
Side 13 - Of four-sided figures, a SQUARE is that which has all its sides equal, and all its angles right angles.
Side 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.
Side 14 - Parallel straight lines are such as are in the same plane, and which being produced ever so far both ways, do not meet.
Side 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.
Side 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.
Side 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.