The First Six, and the Eleventh and Twelfth Books of Euclid's Elements: With the Elements of Plane Trigonometry, and an Appendix in Four Books : With Notes and IllustrationsLongmans, Green, 1845 - 352 páginas |
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Página 2
... Parallel straight lines are those which are in the same plane , and which , being produced ever so far both ways , do not meet . 12. A figure is that which is enclosed by one or more boundaries . 13. Rectilineal or rectilinear figures ...
... Parallel straight lines are those which are in the same plane , and which , being produced ever so far both ways , do not meet . 12. A figure is that which is enclosed by one or more boundaries . 13. Rectilineal or rectilinear figures ...
Página 26
... parallel to CD . A C H Б B G F D For , if it be not parallel , AB and CD , being produced , will meet either towards B , D , or towards A , C : let them be produced and meet towards B , D , in the point G. Therefore GEF is a triangle ...
... parallel to CD . A C H Б B G F D For , if it be not parallel , AB and CD , being produced , will meet either towards B , D , or towards A , C : let them be produced and meet towards B , D , in the point G. Therefore GEF is a triangle ...
Página 27
... parallel ( I. 27 ) to CD . * Wherefore two straight lines , & c . PROP . XXIX . THEOR . - If a straight line fall upon two parallel straight lines , ( 1 ) it makes the alternate angles equal to one another ; ( 2 ) the exterior angle ...
... parallel ( I. 27 ) to CD . * Wherefore two straight lines , & c . PROP . XXIX . THEOR . - If a straight line fall upon two parallel straight lines , ( 1 ) it makes the alternate angles equal to one another ; ( 2 ) the exterior angle ...
Página 28
... parallel to the straight line EF ; AB is also parallel to CD . A L G B K с D H E F Let the straight line LH cut AB , CD , EF ; and because LH cuts the parallel straight lines AB , EF , the angle LGB is equal ( I. 29. part . 2 ) to the ...
... parallel to the straight line EF ; AB is also parallel to CD . A L G B K с D H E F Let the straight line LH cut AB , CD , EF ; and because LH cuts the parallel straight lines AB , EF , the angle LGB is equal ( I. 29. part . 2 ) to the ...
Página 29
... parallel to the straight line AB . Then , because AB is parallel to EC , and AC falls upon them , the alternate angles BAC , ACE are ( I. 29 , part 1 ) equal . Again , because AB is parallel to EC , and BD falls upon them , the exterior ...
... parallel to the straight line AB . Then , because AB is parallel to EC , and AC falls upon them , the alternate angles BAC , ACE are ( I. 29 , part 1 ) equal . Again , because AB is parallel to EC , and BD falls upon them , the exterior ...
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The First Six and the Eleventh and Twelfth Books of Euclid's Elements: With ... James Thomson, gen,James Euclides Sin vista previa disponible - 2016 |
Términos y frases comunes
ABCD altitude angle ABC angle BAC angle equal BC is equal bisected centre chord circle ABC circumference cone const contained corollary cylinder describe a circle diagonal diameter divided draw equal angles equal to AC equiangular equilateral Euclid exterior angle fore fourth given circle given point given ratio given straight line greater half Hence hypotenuse inscribed join less Let ABC magnitudes manner multiple opposite parallel parallelepiped parallelogram perpendicular polygon polyhedron prism PROB.-To produced PROP proportional proposition pyramid radius rectangle rectilineal figure right angles Schol scholium segments semicircle sides similar solid angles square of AC straight line drawn tangent THEOR.-If third triangle ABC trigonometry triplicate ratio vertex vertical angle wherefore
Pasajes populares
Página 130 - If two triangles have one angle of the one equal to one angle of the other and the sides about these equal angles proportional, the triangles are similar.
Página 45 - If a straight line be bisected, and produced to any point, the rectangle contained by the whole line thus produced, and the part of it produced, together with the square on half the line bisected, is equal to the square on the straight line which is made up of the half and the part produced.
Página 2 - A rhombus is that which has all its sides equal, but its angles are not right angles.
Página 50 - To divide a given straight line into two parts, so that the rectangle contained by the whole and one of the parts may be equal to the square on the other part.
Página 38 - 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 7 - If two triangles have two sides of the one equal to two sides of the...
Página 27 - 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 27 - If a side of any triangle be produced, the exterior angle is equal to the two interior and opposite angles ; and the three interior angles of every triangle are equal to two right angles.
Página 15 - If, at a point in a straight line, two other straight lines, upon the opposite sides of it, make the adjacent angles together equal to two right angles, these two straight lines shall be in one and the same straight line.
Página 36 - To describe a parallelogram equal to a given rectilineal figure, and having an angle equal to a given rectilineal angle. Let ABCD be the given rectilineal figure, and E the given rectilineal angle. It is required to describe a parallelogram equal to ABCD, and having an angle equal to E.