The Elements of Euclid for the Use of Schools and Colleges: With Notes, an Appendix, and Exercises. comprising the first six books and portions of the eleventh and twelfth booksMacmillan and Company, 1880 - 400 σελίδες |
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Αποτελέσματα 6 - 10 από τα 80.
Σελίδα 41
... draw BE parallel to CA , and through C draw CF parallel to BD . [ I. 31 . Then each of the figures EBCA , DBCF is a parallelo- gram ; [ Definition . and EBCA is equal to DBCF , because they are on the same base BC , and between the same ...
... draw BE parallel to CA , and through C draw CF parallel to BD . [ I. 31 . Then each of the figures EBCA , DBCF is a parallelo- gram ; [ Definition . and EBCA is equal to DBCF , because they are on the same base BC , and between the same ...
Σελίδα 42
... draw AE parallel to BC , meeting BD at E. and join EC . [ I. 31 . B E Then the triangle ABC is equal to the triangle EBC , because they are on the same base BC , and between the same parallels BC , AE . [ I. 37 . But the triangle ABC is ...
... draw AE parallel to BC , meeting BD at E. and join EC . [ I. 31 . B E Then the triangle ABC is equal to the triangle EBC , because they are on the same base BC , and between the same parallels BC , AE . [ I. 37 . But the triangle ABC is ...
Σελίδα 44
... draw AFG parallel to EC , and through C draw CG parallel to EF . [ I. 31 . Therefore FECG is a parallelogram . And , because BE is equal to EC , [ Definition . [ Construction . the triangle ABE is equal to the triangle AEC , because ...
... draw AFG parallel to EC , and through C draw CG parallel to EF . [ I. 31 . Therefore FECG is a parallelogram . And , because BE is equal to EC , [ Definition . [ Construction . the triangle ABE is equal to the triangle AEC , because ...
Σελίδα 46
... draw AH parallel to BG or EF , and join HB . [ I. 31 . Then , because the straight line HF falls on the parallels AH , EF , the angles AHF , HFE are together equal to two right angles . [ I. 29 . Therefore the angles BHF , HFE are ...
... draw AH parallel to BG or EF , and join HB . [ I. 31 . Then , because the straight line HF falls on the parallels AH , EF , the angles AHF , HFE are together equal to two right angles . [ I. 29 . Therefore the angles BHF , HFE are ...
Σελίδα 49
... draw AC at right angles to AB ; [ I. 11 . and make AD equal to AB ; [ I. 3 . through D draw DE parallel to AB ; and through B draw BE parallel to AD . [ I. 31 . ADEB shall be a square . For ADEB is by construction a parallelogram ...
... draw AC at right angles to AB ; [ I. 11 . and make AD equal to AB ; [ I. 3 . through D draw DE parallel to AB ; and through B draw BE parallel to AD . [ I. 31 . ADEB shall be a square . For ADEB is by construction a parallelogram ...
Άλλες εκδόσεις - Προβολή όλων
The Elements of Euclid for the Use of Schools and Colleges: With Notes, an ... Issac Todhunter Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2014 |
Συχνά εμφανιζόμενοι όροι και φράσεις
ABCD AC is equal angle ABC angle ACB angle BAC angle EDF angles equal Axiom base BC bisects the angle centre chord circle ABC circle described circumference Construction Corollary describe a circle diameter double draw a straight equal angles equal to F equiangular equilateral equimultiples Euclid Euclid's Elements exterior angle given circle given point given straight line gnomon Hypothesis inscribed intersect isosceles triangle less Let ABC magnitudes middle point multiple opposite angles opposite sides parallelogram perpendicular plane polygon produced proportionals PROPOSITION 13 Q.E.D. PROPOSITION quadrilateral radius rectangle contained rectilineal figure remaining angle rhombus right angles right-angled triangle segment shew shewn side BC square on AC straight line &c straight line drawn tangent THEOREM touches the circle triangle ABC triangle DEF twice the rectangle vertex Wherefore
Δημοφιλή αποσπάσματα
Σελίδα 225 - 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.
Σελίδα 284 - 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 73 - When a straight line standing on another straight line makes the adjacent angles equal to one another, each of the angles is called a Right Angle; and the straight line which stands on the other is called a Perpendicular to it.
Σελίδα 39 - Triangles upon the same base, and between the same parallels, are equal to one another.
Σελίδα 10 - 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 353 - AB into two parts, so that the rectangle contained by the whole line and one of the parts, shall be equal to the square on the other part.
Σελίδα 67 - ... subtending the obtuse angle, is greater than the squares on the sides containing the obtuse angle, by twice the rectangle contained by the side upon which, when produced, the perpendicular falls, and the straight line intercepted without the triangle between the perpendicular and the obtuse angle, Let ABC be an obtuse-angled triangle, having the obtuse angle ACB; and from the point A, let AD be drawn perpendicular to BC produced.
Σελίδα 300 - Describe a circle which shall pass through a given point and touch a given straight line and a given circle.
Σελίδα xv - PROPOSITION I. PROBLEM. To describe an equilateral triangle upon a given Jinite straight line. Let AB be the given straight line. It is required to describe an equilateral triangle upon AB, From the centre A, at the distance AB, describe the circle BCD ; (post.
Σελίδα 36 - 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.