A course of practical geometry for mechanicsSimpkin and Marshall, 1843 - 68 páginas |
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Página 16
... triangle whose area is 3 square inches , is equal to the sum of two other triangles , whose areas are 1 square inch and 2 square inches . 54. The Product of two lines is a rectangle , having one of the given lines for its base , and the ...
... triangle whose area is 3 square inches , is equal to the sum of two other triangles , whose areas are 1 square inch and 2 square inches . 54. The Product of two lines is a rectangle , having one of the given lines for its base , and the ...
Página 22
... given , to find the number of degrees it contains . 1. Let G AB as in Prob . II . be the given angle . 2. From A as ... triangle ; measure the three angles , and see whether the sum is equal to 180 degrees . 4. Extend either side of the above ...
... given , to find the number of degrees it contains . 1. Let G AB as in Prob . II . be the given angle . 2. From A as ... triangle ; measure the three angles , and see whether the sum is equal to 180 degrees . 4. Extend either side of the above ...
Página 24
... given distance . 1. Let B C in Prob . VI . be the given line . 2. From B and C as centres , with the given distance ... Triangle , whose sides shall be equal to any three given right lines , if either two of them be greater than the ...
... given distance . 1. Let B C in Prob . VI . be the given line . 2. From B and C as centres , with the given distance ... Triangle , whose sides shall be equal to any three given right lines , if either two of them be greater than the ...
Página 25
... triangle , each of its sides being 14 inches . The first two of the above examples will be scalene , the next two , isosceles , and the last two , equilateral triangles . PROBLEM IX . Through a given right line to draw a perpendicular ...
... triangle , each of its sides being 14 inches . The first two of the above examples will be scalene , the next two , isosceles , and the last two , equilateral triangles . PROBLEM IX . Through a given right line to draw a perpendicular ...
Página 27
William Pease. PROBLEM XII . To let fall a perpendicular to a given line , from a point known to be nearly opposite the middle of the line . 1. Let BC be the given ... triangle and ruler , if not more than 6 inches long . Those longer than 6 ...
William Pease. PROBLEM XII . To let fall a perpendicular to a given line , from a point known to be nearly opposite the middle of the line . 1. Let BC be the given ... triangle and ruler , if not more than 6 inches long . Those longer than 6 ...
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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.