A course of practical geometry for mechanicsSimpkin and Marshall, 1843 - 68 páginas |
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Página 12
... triangle is that which has three equal sides . Its three angles are also equal to one another , and each contains 60 degrees . The three angles of any triangle , are together equal to two right angles or 180 degrees . XXV . An isosceles ...
... triangle is that which has three equal sides . Its three angles are also equal to one another , and each contains 60 degrees . The three angles of any triangle , are together equal to two right angles or 180 degrees . XXV . An isosceles ...
Página 16
... 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 Product of two ...
... 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 Product of two ...
Página 18
... Triangle and Ruler , " made by a good carpenter , answer all the purposes of ... equal , clear , and of uniform thickness ; for to draw a good line is a ... equal parts , so that the eye may become accustomed to judge of equal distances ...
... Triangle and Ruler , " made by a good carpenter , answer all the purposes of ... equal , clear , and of uniform thickness ; for to draw a good line is a ... equal parts , so that the eye may become accustomed to judge of equal distances ...
Página 22
... triangle ; measure the three angles , and see whether the sum is equal to 180 degrees . 4. Extend either side of the above triangle , and see if the exterior angle be equal to the sum of the two interior and opposite angles . PROBLEM V ...
... triangle ; measure the three angles , and see whether the sum is equal to 180 degrees . 4. Extend either side of the above triangle , and see if the exterior angle be equal to the sum of the two interior and opposite angles . PROBLEM V ...
Página 24
... Triangle , whose sides shall be equal to any three given right lines , if either two of them be greater than the third . 1. Let DE , FG , and HI , be the given lines . 2. Draw a line as A B equal to DE . 3. From the point A as a centre ...
... Triangle , whose sides shall be equal to any three given right lines , if either two of them be greater than the third . 1. Let DE , FG , and HI , be the given lines . 2. Draw a line as A B equal to DE . 3. From the point A as a centre ...
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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.