A course of practical geometry for mechanicsSimpkin and Marshall, 1843 - 68 sider |
Inni boken
Resultat 1-5 av 21
Side 7
... perpendicular to the true horizon ; thus , if a weight be freely suspended from a fine hair , when the oscillation has ceased , the hair will present a near approxi- mation to a vertical line , since the weight will , ( by the ...
... perpendicular to the true horizon ; thus , if a weight be freely suspended from a fine hair , when the oscillation has ceased , the hair will present a near approxi- mation to a vertical line , since the weight will , ( by the ...
Side 9
... perpendicular to it . Beginners are apt to suppose that a perpendicular , must be a vertical , or plumb line , which it need not be . XI . An obtuse angle is that which is greater than a right angle . XII . An acute angle is that which ...
... perpendicular to it . Beginners are apt to suppose that a perpendicular , must be a vertical , or plumb line , which it need not be . XI . An obtuse angle is that which is greater than a right angle . XII . An acute angle is that which ...
Side 15
... perpendicular to the base . Vide Def . IV . Book VI . of Euclid . 43. The Vertex of an angle , is its angular point ; that is , the point where the legs of the angle meet . That of a figure , the uppermost angular point above the base ...
... perpendicular to the base . Vide Def . IV . Book VI . of Euclid . 43. The Vertex of an angle , is its angular point ; that is , the point where the legs of the angle meet . That of a figure , the uppermost angular point above the base ...
Side 25
... perpendicular that shall bisect it . 1. Let A B be the given line . 2. From A and B as centres , with any one radius greater than half the distance from A to B , describe arcs cutting each other in C and D. 3. Draw the line CD , which ...
... perpendicular that shall bisect it . 1. Let A B be the given line . 2. From A and B as centres , with any one radius greater than half the distance from A to B , describe arcs cutting each other in C and D. 3. Draw the line CD , which ...
Side 26
... perpendicular to A B. PROBLEM XI . A D EB At a point in a right line to erect a perpendicular , when the given point is at or near the end of the line . 1. Let C be the given point on the line A B. 2. Take any point above the given line ...
... perpendicular to A B. PROBLEM XI . A D EB At a point in a right line to erect a perpendicular , when the given point is at or near the end of the line . 1. Let C be the given point on the line A B. 2. Take any point above the given line ...
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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.