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 Seiten |
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Seite xvi
... proposition itself . The word hypothesis is used in the same sense as supposition . To assist the student in ... Q.E.D. at the end of the discussion of a theorem . Q.E.F. is an abbreviation for quod erat faciendum , that is , which was to be ...
... proposition itself . The word hypothesis is used in the same sense as supposition . To assist the student in ... Q.E.D. at the end of the discussion of a theorem . Q.E.F. is an abbreviation for quod erat faciendum , that is , which was to be ...
Seite 10
... Q.E.D. PROPOSITION 5. THEOREM . The angles at the base of an isosceles triangle are equal to one another ; and if the equal sides be produced the angles on the other side of the base shall be equal to one another . Let ABC be an ...
... Q.E.D. PROPOSITION 5. THEOREM . The angles at the base of an isosceles triangle are equal to one another ; and if the equal sides be produced the angles on the other side of the base shall be equal to one another . Let ABC be an ...
Seite 11
... Q.E.D. Corollary . Hence every equilateral triangle is also equiangular . PROPOSITION 6. THEOREM . If two angles of a triangle BOOK I. 5 . 11.
... Q.E.D. Corollary . Hence every equilateral triangle is also equiangular . PROPOSITION 6. THEOREM . If two angles of a triangle BOOK I. 5 . 11.
Seite 12
... Q.E.D. Corollary . equilateral . Hence every equiangular triangle is also PROPOSITION 7. THEOREM . On the same base , and on the same side of it , there can- not be two triangles having their sides which are terminated at one extremity ...
... Q.E.D. Corollary . equilateral . Hence every equiangular triangle is also PROPOSITION 7. THEOREM . On the same base , and on the same side of it , there can- not be two triangles having their sides which are terminated at one extremity ...
Seite 13
... Q.E.D. PROPOSITION 8. THEOREM . If two triangles have two sides of the one equal to two sides of the other , each to each , and have likewise their bases equal , the angle which is contained by the BOOK I. 7 , 8 . 13.
... Q.E.D. PROPOSITION 8. THEOREM . If two triangles have two sides of the one equal to two sides of the other , each to each , and have likewise their bases equal , the angle which is contained by the BOOK I. 7 , 8 . 13.
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The Elements of Euclid for the Use of Schools and Colleges: With Notes, an ... Issac Todhunter Keine Leseprobe verfügbar - 2014 |
Häufige Begriffe und Wortgruppen
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
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Seite 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.
Seite 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.
Seite 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.
Seite 39 - Triangles upon the same base, and between the same parallels, are equal to one another.
Seite 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.
Seite 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.
Seite 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.
Seite 300 - Describe a circle which shall pass through a given point and touch a given straight line and a given circle.
Seite 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.
Seite 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.