A course of practical geometry for mechanicsSimpkin and Marshall, 1843 - 68 sider |
Inni boken
Resultat 1-5 av 7
Side 18
... scales engraved on it . A larger set contains , besides these , a pair of dividers , a long drawing pen , bow pen , and a bow pen- cil ; the two latter for circles and arcs not exceeding an inch radius . Still larger sets contain hair ...
... scales engraved on it . A larger set contains , besides these , a pair of dividers , a long drawing pen , bow pen , and a bow pen- cil ; the two latter for circles and arcs not exceeding an inch radius . Still larger sets contain hair ...
Side 21
... scale of chords ( marked CHO or C ) on an ivory scale , and from A as a centre , describe the arc G F. 3. Take the number of degrees which the angle required is to contain , from the same line of chords ; and from F as a centre ...
... scale of chords ( marked CHO or C ) on an ivory scale , and from A as a centre , describe the arc G F. 3. Take the number of degrees which the angle required is to contain , from the same line of chords ; and from F as a centre ...
Side 26
... scale , ( say a scale of inches or half - inches on a common foot rule . ) 2. From C as a centre , with 4 equal parts as a radius , de- scribe an arc as at F. 3. From E as a centre , with 5 equal parts as a radius , de- scribe an arc ...
... scale , ( say a scale of inches or half - inches on a common foot rule . ) 2. From C as a centre , with 4 equal parts as a radius , de- scribe an arc as at F. 3. From E as a centre , with 5 equal parts as a radius , de- scribe an arc ...
Side 30
... scales ; for , if AB be an inch , and it represent 9 feet , then , to divide A B into 9 equal parts , so as to 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 ...
... scales ; for , if AB be an inch , and it represent 9 feet , then , to divide A B into 9 equal parts , so as to 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 ...
Side 31
... scale or line of equal parts equal to 600 of those parts ; H M equal to 480 of the same parts , ( calling these tons of coals ; ) and HL equal to 550 parts , ( calling them pounds ; ) then by ap- plying H N on the same scale , the ...
... scale or line of equal parts equal to 600 of those parts ; H M equal to 480 of the same parts , ( calling these tons of coals ; ) and HL equal to 550 parts , ( calling them pounds ; ) then by ap- plying H N on the same scale , the ...
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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.