A course of practical geometry for mechanicsSimpkin and Marshall, 1843 - 68 sider |
Inni boken
Resultat 1-5 av 15
Side 11
... polygons , by more than four straight lines . The sides of a trilateral figure must of necessity contain three angles , those of a quadrilateral , four ; and of a multi- lateral , as many angles as there are sides to the polygon ; when ...
... polygons , by more than four straight lines . The sides of a trilateral figure must of necessity contain three angles , those of a quadrilateral , four ; and of a multi- lateral , as many angles as there are sides to the polygon ; when ...
Side 14
... polygons of 13 , or 14 sides , & c . 33. A Regular polygon has all its sides , and all its angles equal : if they are not both equal , the polygon is Irregular . 34. The angle at the Circumference of a polygon , is that which is ...
... polygons of 13 , or 14 sides , & c . 33. A Regular polygon has all its sides , and all its angles equal : if they are not both equal , the polygon is Irregular . 34. The angle at the Circumference of a polygon , is that which is ...
Side 15
William Pease. 37. If two sides of a polygon contain an angle , whose vertex projects towards the interior of the figure , it is called a Re - entering angle . Those whose vertices project outwards , are Salient angles . A Solid is that ...
William Pease. 37. If two sides of a polygon contain an angle , whose vertex projects towards the interior of the figure , it is called a Re - entering angle . Those whose vertices project outwards , are Salient angles . A Solid is that ...
Side 41
... polygon is equiangular as well as equilateral . EXAMPLES . 1. Describe a regular pentagon on a line 2 inches long . 2. A regular pentagon is required one of whose sides is to be 14 inches . PROBLEM XLII . On a given line to construct a ...
... polygon is equiangular as well as equilateral . EXAMPLES . 1. Describe a regular pentagon on a line 2 inches long . 2. A regular pentagon is required one of whose sides is to be 14 inches . PROBLEM XLII . On a given line to construct a ...
Side 42
... cuts the diagonals , draw lines pa- rallel to each diagonal , cutting off the corners of the square ; when the octagon will be formed as required . PROBLEM XLVI . To describe any polygon upon a given 42 PRACTICAL GEOMETRY .
... cuts the diagonals , draw lines pa- rallel to each diagonal , cutting off the corners of the square ; when the octagon will be formed as required . PROBLEM XLVI . To describe any polygon upon a given 42 PRACTICAL GEOMETRY .
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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.