A course of practical geometry for mechanics1856 |
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Página 10
... distance throughout . 62. Parallel Planes are such as are at any given per- pendicular distance throughout . The polished surfaces of perfect plate glass are parallel planes . 63. Oblique Planes are such as are , in relation to each ...
... distance throughout . 62. Parallel Planes are such as are at any given per- pendicular distance throughout . The polished surfaces of perfect plate glass are parallel planes . 63. Oblique Planes are such as are , in relation to each ...
Página 16
... distance less than the length of the line A B , or A C. With this distance as radius describe an arc , as DE , ( with the pencil leg , ) cut- ting the lines A B and A C in the points D and E. Print the letters DE . B 2. Next place the ...
... distance less than the length of the line A B , or A C. With this distance as radius describe an arc , as DE , ( with the pencil leg , ) cut- ting the lines A B and A C in the points D and E. Print the letters DE . B 2. Next place the ...
Página 18
... distance from E to D in the compasses , and apply it to the scale , when the number of degrees contained in the given angle will be shown . Note . If the angle be obtuse , 90 degrees must first be applied to the arc , and the number of ...
... distance from E to D in the compasses , and apply it to the scale , when the number of degrees contained in the given angle will be shown . Note . If the angle be obtuse , 90 degrees must first be applied to the arc , and the number of ...
Página 20
... distance . Let A B be the given straight line . 1. From A and B as centres , with the given distance as radius , describe arcs as at C and D. 2. Draw the line CD touching the arcs , and it shall be parallel to A B. A EXAMPLES . 1. Draw ...
... distance . Let A B be the given straight line . 1. From A and B as centres , with the given distance as radius , describe arcs as at C and D. 2. Draw the line CD touching the arcs , and it shall be parallel to A B. A EXAMPLES . 1. Draw ...
Página 21
... distance . 2. Draw a vertical line 3 inches long ; and , on each side of it , draw another line at 1 inch distance . 3. Draw two lines , each parallel to another line ; the first three - quarters of an inch distant from the given line ...
... distance . 2. Draw a vertical line 3 inches long ; and , on each side of it , draw another line at 1 inch distance . 3. Draw two lines , each parallel to another line ; the first three - quarters of an inch distant from the given line ...
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Términos y frases comunes
13 inches A B C A C B Aldersgate Street altitude angle equal arc or angle Arithmetical mean Bisect Book centre circumference contain an angle cutting A B describe a circle describe a regular describe an arc diagonal scale distance Divide a line Draw a line Draw chords Draw the line ellipse equilateral triangle Euclid Euclid's Elements EXAMPLES French FRENCH LANGUAGE Geometry given angle given circle given line given parallelogram given point given square given straight line given triangle Harmonical mean heptagon inch side inches long inches radius inches respectively inscribe isosceles triangle Join Let A B line 2 inches line A B number of degrees number of equal parallel parallel ruler perpendicular plain scale plane Prob PROBLEM produced Prop protractor pupil radii rectangle rectilineal figure regular pentagon regular polygon Relfe rhombus right angles right line right-angled triangle scale of chords segment square equal triangle required vertex vertical angle
Pasajes populares
Página 8 - 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 8 - 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 7 - 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 68 - In any right-angled triangle, the square which is described upon the side subtending the right angle, is equal to the squares described upon the sides which contain the right angle.
Página 14 - An angle in a segment is the angle contained by two straight lines drawn from any point in the circumference of the segment to the extremities of the straight . line which is the base of the segment.
Página 9 - A diameter of a circle is a straight line drawn through the centre, and terminated both ways by the circumference.
Página 11 - Parallel straight lines are such as are in the same plane, and which being produced ever so far both ways, do not meet.
Página 7 - ... straight lines, and the other upon the other line : Thus the angle which is contained by the straight lines, AB, CB, is named the angle ABC, or CBA ; that which is contained by AB...