A course of practical geometry for mechanicsSimpkin and Marshall, 1843 - 68 páginas |
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Página 12
... opposite to the equal sides . XXVI . A scalene triangle is that which has three unequal sides . All its angles are unequal . XXVII . A right - angled triangle is that which has a right angle . It may be either isosceles or scalene ...
... opposite to the equal sides . XXVI . A scalene triangle is that which has three unequal sides . All its angles are unequal . XXVII . A right - angled triangle is that which has a right angle . It may be either isosceles or scalene ...
Página 13
... opposite angles are necessarily equal . XXXIII . 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 . Its opposite angles are necessarily equal . 2 ク A ...
... opposite angles are necessarily equal . XXXIII . 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 . Its opposite angles are necessarily equal . 2 ク A ...
Página 14
... opposite sides parallel . It may have each pair of angles at the extremities of each of its parallel sides equal , or all its angles may be unequal . XXXV . Parallel straight lines are such as are in the same plane , and which , being ...
... opposite sides parallel . It may have each pair of angles at the extremities of each of its parallel sides equal , or all its angles may be unequal . XXXV . Parallel straight lines are such as are in the same plane , and which , being ...
Página 15
... opposite to it . The Altitude of any figure is the straight line drawn from its vertex perpendicular to the base . Vide Def . IV . Book VI . of Euclid . 43. The Vertex of an angle , is its angular point ; that is , the point where the ...
... opposite to it . The Altitude of any figure is the straight line drawn from its vertex perpendicular to the base . Vide Def . IV . Book VI . of Euclid . 43. The Vertex of an angle , is its angular point ; that is , the point where the ...
Página 22
... 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. To make an angle with the Protractor , 22 PRACTICAL GEOMETRY .
... 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. To make an angle with the Protractor , 22 PRACTICAL GEOMETRY .
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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.