Euclid's Elements: Or, Second Lessons in Geometry,in the Order of Simson's and Playfair's Editions ...Collins, Brother & Company, 1846 - 138 σελίδες |
Αναζήτηση στο βιβλίο
Αποτελέσματα 1 - 5 από τα 21.
Σελίδα 8
... fourth of the compass of the angular point . 10. A right angle is the declination of two straight lines to one - fourth of the compass of the angular point . 11. An obtuse angle is any declination of two straight lines greater than one ...
... fourth of the compass of the angular point . 10. A right angle is the declination of two straight lines to one - fourth of the compass of the angular point . 11. An obtuse angle is any declination of two straight lines greater than one ...
Σελίδα 59
... AD ( a ) , or its equal C ; and the difference of DE and DF is EF , which is equal to AB . Recite ( a ) p . 36 of b . 3 A BOOK FOURTH . Definitions . 1. One rectilineal figure is BOOK III.1 59 SECOND LESSONS IN GEOMETRY .
... AD ( a ) , or its equal C ; and the difference of DE and DF is EF , which is equal to AB . Recite ( a ) p . 36 of b . 3 A BOOK FOURTH . Definitions . 1. One rectilineal figure is BOOK III.1 59 SECOND LESSONS IN GEOMETRY .
Σελίδα 60
... FOURTH . Definitions . 1. One rectilineal figure is said to be inscribed in another , when all the angles of the former are upon the sides of the latter . Note . - Regular polygons , which have the same number of equal sides , thus ...
... FOURTH . Definitions . 1. One rectilineal figure is said to be inscribed in another , when all the angles of the former are upon the sides of the latter . Note . - Regular polygons , which have the same number of equal sides , thus ...
Σελίδα 69
... fourth , when equimultiples of the first and third , also of the second and fourth , being taken ; if the multi- ple of the first be greater than that of the second , the multiple of the third is greater than that of the fourth ; if ...
... fourth , when equimultiples of the first and third , also of the second and fourth , being taken ; if the multi- ple of the first be greater than that of the second , the multiple of the third is greater than that of the fourth ; if ...
Σελίδα 70
... fourth that of the third ; then the ratio of the first to the fourth is the triplicate or cube of the ratio of the first to the second . Such ratios are called compound . 10. And when any number of magnitudes of the same kind are in a ...
... fourth that of the third ; then the ratio of the first to the fourth is the triplicate or cube of the ratio of the first to the second . Such ratios are called compound . 10. And when any number of magnitudes of the same kind are in a ...
Άλλες εκδόσεις - Προβολή όλων
Euclid's Elements, Or Second Lessons in Geometry, in the Order of Simson's ... D. M'Curdy Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2017 |
Euclid's Elements, Or Second Lessons in Geometry, in the Order of Simson's ... D. M'Curdy Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2017 |
Συχνά εμφανιζόμενοι όροι και φράσεις
ABCD alternate angles angle ACD angles ABC angles equal antecedents Argument base BC bisected centre Chart chord circle ABC circumference Constr Denison Olmsted diameter draw drawn equal angles equal arcs equal radii equal sides equals the squares equi equiangular equilateral equilateral polygon equimultiples exterior angle fore Geometry given circle given rectilineal given straight line gles gnomon greater half inscribed isosceles isosceles triangle join less meet multiple opposite angles parallelogram parallelopipeds pentagon perimeter perpendicular plane polygon produced propositions Q. E. D. Recite radius ratio rectangle rectilineal figure School segment semicircle similar similar triangles sine square of AC tangent touches the circle triangle ABC unequal Wherefore
Δημοφιλή αποσπάσματα
Σελίδα 90 - If two triangles have one angle of the one equal to one angle of the other, and the sides about the equal angles proportionals, the triangles shall be equiangular, and shall have those angles equal which are opposite to the homologous sides.
Σελίδα 117 - In the same way it may be proved that a : b : : sin. A : sin. B, and these two proportions may be written a : 6 : c : : sin. A : sin. B : sin. C. THEOREM III. t8. In any plane triangle, the sum of any two sides is to their difference as the tangent of half the sum of the opposite angles is to the tangent of half their difference. By Theorem II. we have a : b : : sin. A : sin. B.
Σελίδα 92 - IN a right-angled triangle, if a perpendicular be drawn from the right angle to the base, the triangles on each side of it are similar to the whole triangle, and to one another.
Σελίδα 79 - THEOREM. lf the first has to the second the same ratio which the third has to the fourth, but the third to the fourth, a greater ratio than the fifth has to the sixth ; the first shall also have to the second a greater ratio than the fifth, has to the sixth.
Σελίδα 87 - If a straight line be drawn parallel to one of the sides of a triangle, it shall cut the other sides, or those sides produced, proportionally...
Σελίδα 26 - Triangles upon equal bases, and between the same parallels, are equal to one another.
Σελίδα 94 - Equal parallelograms which have one angle of the one equal to one angle of the other, have their sides about the equal angles reciprocally proportional ; and parallelograms that have one angle of the one equal to one angle of the other, and their sides about the equal angles reciprocally proportional, are equal to one another.
Σελίδα 12 - THE angles at the base of an isosceles triangle are equal to one another : and, if the equal sides be produced, the angles upon the other side of the base shall be equal.
Σελίδα 133 - If a straight line stand at right angles to each of two straight lines at the point of their intersection, it shall also be at right angles to the plane which passes through them, that is, to the plane in which they are.
Σελίδα 13 - AB be the greater, and from it cut (3. 1.) off DB equal to AC the less, and join DC ; therefore, because A in the triangles DBC, ACB, DB is equal to AC, and BC common to both, the two sides DB, BC are equal to the two AC, CB. each to each ; and the angle DBC is equal to the angle ACB; therefore the base DC is equal to the base AB, and the triangle DBC is< equal to the triangle (4. 1.) ACB, the less to 'the greater; which is absurd.