Elements of Geometry: Containing the First Six Books of Euclid, with a Supplement on the Quadrature of the Circle, and the Geometry of Solids : to which are Added, Elements of Plane and Spherical TrigonometryMarot & Walter, 1826 - 320 σελίδες |
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Σελίδα 41
... draw 731. 1. ) BE parallel to CA ; and through C draw CF parallel to BD : Therefore , each of the figures EBCA , DBCF is a paral- E B A D F lelogram ; and DBCA is equal ( 35. 1. ) to DBCF , because they are upon the same base BC , and ...
... draw 731. 1. ) BE parallel to CA ; and through C draw CF parallel to BD : Therefore , each of the figures EBCA , DBCF is a paral- E B A D F lelogram ; and DBCA is equal ( 35. 1. ) to DBCF , because they are upon the same base BC , and ...
Σελίδα 42
... draw BG parallel ( 31. 1. ) to CA , and through F draw FH parallel to ED : Then each of the figures GBCA , DEFH is a paral- lelogram ; and they are equal to ( 36. 1. ) one an- other , because they are upon equal bases BC , EF and ...
... draw BG parallel ( 31. 1. ) to CA , and through F draw FH parallel to ED : Then each of the figures GBCA , DEFH is a paral- lelogram ; and they are equal to ( 36. 1. ) one an- other , because they are upon equal bases BC , EF and ...
Σελίδα 44
... draw ( 31. 1. ) AG parallel to BC , and through C draw CG ( 31.1 . ) parallel to EF : Therefore FECG is a parallelogram : And because A BE is equal to EC : the triangle ABE is likewise equal ( 38. 1 ) to the triangle AEC , since they ...
... draw ( 31. 1. ) AG parallel to BC , and through C draw CG ( 31.1 . ) parallel to EF : Therefore FECG is a parallelogram : And because A BE is equal to EC : the triangle ABE is likewise equal ( 38. 1 ) to the triangle AEC , since they ...
Σελίδα 45
... draw ( 31. 1. ) AH parallel to BG or F , and join HB . Then because the straight line HF falls upon the parallels AH , EF , the angles AHF , HFE , are together equal ( 29. 1. ) to two right angles ; wherefore the angles BHF , HFE are ...
... draw ( 31. 1. ) AH parallel to BG or F , and join HB . Then because the straight line HF falls upon the parallels AH , EF , the angles AHF , HFE , are together equal ( 29. 1. ) to two right angles ; wherefore the angles BHF , HFE are ...
Σελίδα 46
... draw ( 11. 1. ) AC at right angles to AB ; and make ( 3. 1. ) AD equal to AB , and through the point D draw DE pa- rallel ( 31. 1. ) to AB , and through B draw BE parallel to AD ; there- fore ADEB is a parallelogram : Whence AB is equal ...
... draw ( 11. 1. ) AC at right angles to AB ; and make ( 3. 1. ) AD equal to AB , and through the point D draw DE pa- rallel ( 31. 1. ) to AB , and through B draw BE parallel to AD ; there- fore ADEB is a parallelogram : Whence AB is equal ...
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Elements of Geometry: Containing the First Six Books of Euclid; With Two ... Formerly Chairman Department of Immunology John Playfair Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2016 |
Συχνά εμφανιζόμενοι όροι και φράσεις
ABC is equal ABCD adjacent angles altitude angle ABC angle ACB angle BAC angle EDF arch AC base BC bisected centre circle ABC circumference cosine cylinder demonstrated diameter draw equal and similar equal angles equiangular equilateral equilateral polygon equimultiples Euclid exterior angle fore four right angles given straight line greater hypotenuse inscribed join less Let ABC Let the straight line BC meet multiple opposite angle parallel parallelogram perpendicular polygon prism PROB produced proportionals proposition Q. E. D. COR Q. E. D. PROP radius ratio rectangle contained rectilineal figure remaining angle segment semicircle side BC sine solid angle solid parallelopipeds spherical angle spherical triangle straight line AC THEOR third touches the circle triangle ABC triangle DEF wherefore
Δημοφιλή αποσπάσματα
Σελίδα 125 - 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.
Σελίδα 39 - THE straight lines which join the extremities of two equal and parallel straight lines, towards the same parts, are also themselves equal and parallel. Let AB, CD be equal and parallel straight lines, and joined towards the same parts by the straight lines AC, BD ; AC, BD are also equal and parallel.
Σελίδα 41 - Parallelograms upon the same base and between the same parallels, are equal to one another.
Σελίδα 19 - BG; and things that are equal to the same are equal to one another; therefore the straight line AL is equal to BC. Wherefore from the given point A a straight line AL has been drawn equal to the given straight line BC.
Σελίδα 145 - If two triangles which have two sides of the one proportional to two sides of the other, be joined at one angle, so as to have their homologous sides parallel to one another ; the remaining sides shall be in a straight line. Let ABC, DCE be two triangles which have the two sides BA, AC proportional to the two CD, DE, viz.
Σελίδα 30 - If, from the ends of the side of a triangle, there be drawn two straight lines to a point within the triangle, these shall be less than, the other two sides of the triangle, but shall contain a greater angle.
Σελίδα 136 - FGL, have an angle in one equal to an angle in the other, and their sides about these equal angles proportionals ; the triangle ABE is equiangular (6.
Σελίδα 51 - If a straight line be divided into any two parts, the square of the whole line is equal to the squares of the two parts, together with twice the rectangle contained by the parts.
Σελίδα 20 - DEF, and be equal to it ; and the other angles of the one shall coincide with the remaining angles of the other and be equal to them, viz. the angle ABC to the angle DEF, and the angle ACB to DFE.
Σελίδα 55 - If a straight line be divided into two equal, and also into two unequal parts ; the squares on the two unequal parts are together double of the square on half the line, and of the square on the line between the points of section.