Elements of Geometry and TrigonometryA. S. Barnes and Company, 1852 - 432 páginas |
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Página 24
... Let the side ED be placed on the equal side BA ; D A Да E FB then , since the angle D is equal to the angle A , the side DF will take the direction AC . But DF is equal to AC ; therefore the point F will fall on C , and the third side ...
... Let the side ED be placed on the equal side BA ; D A Да E FB then , since the angle D is equal to the angle A , the side DF will take the direction AC . But DF is equal to AC ; therefore the point F will fall on C , and the third side ...
Página 25
... Let EDF and BAO be two triangles , having the angle E equal to the angle B ... falling on B , and the point Fon C. Then , since the angle E is equal to the angle B ... fall at their intersection A : hence , the two triangles EDF , BAC ...
... Let EDF and BAO be two triangles , having the angle E equal to the angle B ... falling on B , and the point Fon C. Then , since the angle E is equal to the angle B ... fall at their intersection A : hence , the two triangles EDF , BAC ...
Página 28
... fall on the side BC , it is evident that GC , or its equal EF , will be shorter than BC ( A. 8 ) . B G E F A Case III . Lastly , if the point G fall ... Let EDF and BAC be two triangles , having the side ED = BA , the side EF - BC , and the ...
... fall on the side BC , it is evident that GC , or its equal EF , will be shorter than BC ( A. 8 ) . B G E F A Case III . Lastly , if the point G fall ... Let EDF and BAC be two triangles , having the side ED = BA , the side EF - BC , and the ...
Página 32
... let fall on the line , and oblique lines be drawn to different points : 1st . The perpendicular will be shorter than any oblique line . 2d . Any two oblique lines which intersect the given line at points equally distant from the foot of ...
... let fall on the line , and oblique lines be drawn to different points : 1st . The perpendicular will be shorter than any oblique line . 2d . Any two oblique lines which intersect the given line at points equally distant from the foot of ...
Página 35
... Let the two lines AC , BD , be perpendicular to AB ; then will they be parallel . For , if they could meet in a point 0 , on either side of AB , there would be two per- pendiculars OA , OB , let fall from the same point on the same ...
... Let the two lines AC , BD , be perpendicular to AB ; then will they be parallel . For , if they could meet in a point 0 , on either side of AB , there would be two per- pendiculars OA , OB , let fall from the same point on the same ...
Otras ediciones - Ver todas
Elements of Geometry and Trigonometry: From the Works of A. M. Legendre Adrien Marie Legendre,Charles Davies Sin vista previa disponible - 2016 |
Términos y frases comunes
adjacent angles altitude angle ACB angle BAD bisect centre chord circ circumference circumscribed common comp cone consequently convex surface cos² Cosine Cosine D Cotang cylinder diagonal diameter distance divided draw drawn equations equivalent feet figure find the area frustum given angle given line gles greater hence homologous homologous sides hypothenuse included angle inscribed circle intersect less Let ABC let fall logarithm magnitudes measured by half middle point number of sides opposite parallel parallelogram parallelopipedon pendicular perimeter perpendicular plane MN polyedral angle polyedron PROBLEM PROPOSITION pyramid quadrant radii radius ratio rectangle regular polygon right angles right-angled triangle Scholium secant segment side BC similar sin² sine slant height solidity sphere spherical polygon spherical triangle square described straight line Tang tangent THEOREM triangle ABC triangular prism triedral angles vertex vertices ΙΟ
Pasajes populares
Página 24 - If two triangles have two sides and the included angle of the one, equal to two sides and the included angle of the other, each to each, the two triangles will be equal.
Página 38 - That, if a straight line falling on two straight lines make the interior angles on the same side less than two right angles, the two straight lines, if produced indefinitely, meet on that side on which are the angles less than the two right angles.
Página 227 - A spherical triangle is a portion of the surface of a sphere, bounded by three arcs of great circles.
Página 271 - The circumference of every circle is supposed to be divided into 360 equal parts, called degrees...
Página 43 - Hence, the interior angles plus four right angles, is equal to twice as many right angles as the polygon has sides, and consequently, equal to the sum of the interior angles plus the sum of the exterior angles.
Página 215 - The surface of a sphere is equal to the product of its diameter by the circumference of a great circle.
Página 107 - If two triangles have two angles of the one equal to two angles of the other, each to each, and also one side of the one equal to the corresponding side of the other, the triangles are congruent.
Página 93 - The area of a parallelogram is equal to the product of its base and altitude.
Página 231 - The angles of spherical triangles may be compared together, by means of the arcs of great circles described from their vertices as poles and included between their sides : hence it is easy to make an angle of this kind equal to a given angle.
Página 232 - F, be respectively poles of the sides BC, AC, AB. For, the point A being the pole of the arc EF, the distance AE is a 'quadrant ; the point C being the pole of the arc DE, the distance CE is likewise a quadrant : hence the point E is...