A course of practical geometry for mechanicsSimpkin and Marshall, 1843 - 68 páginas |
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Página 7
... given to objects which would require more paper than could be spared to assign to the horizon its true position ; but this is never forgotten either by the experienced draughts- man , or the judicious connoisseur . 4. A ... point of contact .
... given to objects which would require more paper than could be spared to assign to the horizon its true position ; but this is never forgotten either by the experienced draughts- man , or the judicious connoisseur . 4. A ... point of contact .
Página 16
... a circle , the angle contained by them is called the angle at the Centre of the circle ; and if from the points where these radii touch the circumference , two lines be drawn to any other point in the circumference , the angle contained ...
... a circle , the angle contained by them is called the angle at the Centre of the circle ; and if from the points where these radii touch the circumference , two lines be drawn to any other point in the circumference , the angle contained ...
Página 20
William Pease. PROBLEMS . PROBLEM I. To bisect a given rectilineal angle . 1. Draw two right lines of any length , and let them contain any angle . Call this the given ... point D , and with the same radius as before , ( or any other , ...
William Pease. PROBLEMS . PROBLEM I. To bisect a given rectilineal angle . 1. Draw two right lines of any length , and let them contain any angle . Call this the given ... point D , and with the same radius as before , ( or any other , ...
Página 21
... given point in a given right line , to make an an- gle equal to a given rectilineal angle . 1. Let ECD be the given angle ; A B the given right line ; and A the given point . It is required from A to draw a line GA , which , with B A ...
... given point in a given right line , to make an an- gle equal to a given rectilineal angle . 1. Let ECD be the given angle ; A B the given right line ; and A the given point . It is required from A to draw a line GA , which , with B A ...
Página 23
... a given point , to draw a right line that shall be parallel to a given right line . 1. Let A be the given point , and BC the given right line . 2. From the point A draw a right line AD , cutting BC at any angle with it . 3. Draw FA E ...
... a given point , to draw a right line that shall be parallel to a given right line . 1. Let A be the given point , and BC the given right line . 2. From the point A draw a right line AD , cutting BC at any angle with it . 3. Draw FA E ...
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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.