A course of practical geometry for mechanicsSimpkin and Marshall, 1843 - 68 páginas |
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Página 16
... inches long is equal to the sum of two other lines of 1 inch and 2 inches long ; also a 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 ...
... inches long is equal to the sum of two other lines of 1 inch and 2 inches long ; also a 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 ...
Página 18
... long drawing pen , bow pen , and a bow pen- cil ; the two latter for circles and arcs not exceeding an inch radius ... inches long , and divide it , by repeated trials , into two , three , or four equal parts , so that the eye may become ...
... long drawing pen , bow pen , and a bow pen- cil ; the two latter for circles and arcs not exceeding an inch radius ... inches long , and divide it , by repeated trials , into two , three , or four equal parts , so that the eye may become ...
Página 19
... longer necessary . They may be compared to a scaffold , which is to be removed when the building is finished . They ... inches , in the Examples for Practice , feet , or other magnitudes may be substituted if wanted . PROBLEMS . PROBLEM ...
... longer necessary . They may be compared to a scaffold , which is to be removed when the building is finished . They ... inches , in the Examples for Practice , feet , or other magnitudes may be substituted if wanted . PROBLEMS . PROBLEM ...
Página 27
... inches long ; and by the triangle and ruler , if not more than 6 inches long . Those longer than 6 inches should be con- structed by one of the foregoing problems . The T square would be a valuable instrument for drawing PRACTICAL ...
... inches long ; and by the triangle and ruler , if not more than 6 inches long . Those longer than 6 inches should be con- structed by one of the foregoing problems . The T square would be a valuable instrument for drawing PRACTICAL ...
Página 28
... inches long and half an inch broad . 2. Make an oblong 4 inches by 3 inches . 3. Make a rectangular parallelogram , each of its sides being 2 inches . This figure will be a square . 4. Make a square on a line half an inch long . By the ...
... inches long and half an inch broad . 2. Make an oblong 4 inches by 3 inches . 3. Make a rectangular parallelogram , each of its sides being 2 inches . This figure will be a square . 4. Make a square on a line half an inch long . By the ...
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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.