Elements of Geometry, Conic Sections, and Plane TrigonometryHarber & brothers, 1871 - 58 páginas |
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Página 12
... coincide with each other , that is , which exactly fill the same space , are equal . 9. The whole is greater than any of its parts . 10. The whole is equal to the sum of all its parts . 11. From one point to another only one straight ...
... coincide with each other , that is , which exactly fill the same space , are equal . 9. The whole is greater than any of its parts . 10. The whole is equal to the sum of all its parts . 11. From one point to another only one straight ...
Página 14
... coinciding with AC , the line GH will coincide with CD . For , if it could have any other position , as CK , then , because the angle EGH is equal to FGH ( Def . 10 ) , the angle ACK must be equal to BCK , and therefore the angle ACD is ...
... coinciding with AC , the line GH will coincide with CD . For , if it could have any other position , as CK , then , because the angle EGH is equal to FGH ( Def . 10 ) , the angle ACK must be equal to BCK , and therefore the angle ACD is ...
Página 16
... coincide throughout their whole extent . F : A B C D It is plain that the two lines must co- incide between A and B , for otherwise there would be two straight lines between A and B , which is impossible ( Axiom 11 ) . Suppose , however ...
... coincide throughout their whole extent . F : A B C D It is plain that the two lines must co- incide between A and B , for otherwise there would be two straight lines between A and B , which is impossible ( Axiom 11 ) . Suppose , however ...
Página 17
... coincide with the point E , because AB is equal to DE ; and AB , coin- ciding with DE , AC will coincide with DF , because the an- gle A is equal to the angle D. Hence , also , the point C will coincide with the point F , because AC is ...
... coincide with the point E , because AB is equal to DE ; and AB , coin- ciding with DE , AC will coincide with DF , because the an- gle A is equal to the angle D. Hence , also , the point C will coincide with the point F , because AC is ...
Página 18
... coincide with the point F , because BC is equal to EF . Also , since the angle B is equal to the an- gle E , the side BA will take the direction ED , and therefore the point A will be found somewhere in the line DE . And because the ...
... coincide with the point F , because BC is equal to EF . Also , since the angle B is equal to the an- gle E , the side BA will take the direction ED , and therefore the point A will be found somewhere in the line DE . And because the ...
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Términos y frases comunes
ABCD allel altitude angle ABC angle ACB angle BAC base bisected chord circle circumference cone convex surface cosine curve described diagonals diameter dicular divided draw ellipse equal angles equal to AC equiangular equilateral equivalent exterior angle figure foci four right angles frustum given angle given point greater hyperbola hypothenuse inscribed intersect Join latus rectum less Let ABC logarithm major axis mean proportional meet multiplied number of sides opposite ordinate parabola parallelogram parallelopiped pendicular perimeter perpen perpendicular plane MN principal vertex prism PROPOSITION pyramid quadrant radii radius ratio rectangle regular polygon right angles right angles Prop right-angled triangle Scholium secant segment side AC similar sine solid angle sphere spherical triangle square subtangent tang tangent THEOREM triangle ABC vertex vertices
Pasajes populares
Página 20 - The circumference of every circle is supposed to' be divided into 360 equal parts, called degrees ; each degree into 60 minutes, and each minute into 60 seconds. Degrees, minutes, and seconds are designated by the characters °, ', ". Thus 23° 14' 35" is read 23 degrees, 14 minutes, and 35 seconds.
Página 148 - The radius of a sphere, is a straight line drawn from the center to any point of the surface.
Página 18 - BC common to the two triangles, which is adjacent to their equal angles ; therefore their other sides shall be equal, each to each, and the third angle of the one to the third angle of the other, (26.
Página 34 - ... therefore the angle ACB is equal to the angle CBD. And because the straight line BC meets the two straight lines AC, BD, and makes the alternate angles ACB, CBD equal to one another, AC is parallel to BD.
Página 32 - All the interior angles of any rectilineal figure, together with four right angles, are equal to twice as many right angles as the figure has sides.
Página 159 - If two triangles have two angles and the included side of the one, equal to two angles and the included side of the other, each to each, the two triangles will be equal.
Página 44 - A Circle is a plane figure bounded by a curved line every point of which is equally distant from a point within called the center.
Página 30 - If two triangles have two angles of the one equal to two angles of the other, each to each, and one side equal to one side, viz.
Página 29 - If a straight line is perpendicular to one of two parallel lines, it is perpendicular to the other also.
Página 151 - But when a solid angle is formed by three plane angles, the sum of any two of them is greater than the third (Prop.