Euclid, book i., propositions i. to xxvi., with exercises and alternative proofs [by T. Dalton].1877 |
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Αποτελέσματα 1 - 5 από τα 6.
Σελίδα 2
... at the conclusion of a problem . Q.E.D. stands for Quod erat demonstrandum , or , which was to be proved , and is placed at the conclusion of a theorem . T. D. PLANE GEOMETRY . DEFINITIONS . 1. A POINT is that 2 INTRODUCTION .
... at the conclusion of a problem . Q.E.D. stands for Quod erat demonstrandum , or , which was to be proved , and is placed at the conclusion of a theorem . T. D. PLANE GEOMETRY . DEFINITIONS . 1. A POINT is that 2 INTRODUCTION .
Σελίδα 15
... prove that AD bisects the angle BAC . 2. If two isosceles triangles stand upon opposite sides of the same base , the straight line which joins their vertices will bisect the vertical angles ; and also will bisect the base at right ...
... prove that AD bisects the angle BAC . 2. If two isosceles triangles stand upon opposite sides of the same base , the straight line which joins their vertices will bisect the vertical angles ; and also will bisect the base at right ...
Σελίδα 18
... proved independently of the seventh ; the student is therefore advised to omit this proposition on his first reading of Euclid . ] Upon the same base , and on the same side of it , there cannot be two triangles having their sides which ...
... proved independently of the seventh ; the student is therefore advised to omit this proposition on his first reading of Euclid . ] Upon the same base , and on the same side of it , there cannot be two triangles having their sides which ...
Σελίδα 32
... Prove the proposition without producing any of the sides , by joining A with any point in BC . 4. In an isosceles triangle shew that each of the angles at the base is less than a right angle . Do we know anything as to the magnitude of ...
... Prove the proposition without producing any of the sides , by joining A with any point in BC . 4. In an isosceles triangle shew that each of the angles at the base is less than a right angle . Do we know anything as to the magnitude of ...
Σελίδα 35
... prove ( 1 ) that AB , BC are greater than AC , and ( 2 ) that AC , CB are greater than AB . 2. Prove the proposition without producing one of the sides by bisecting one of the angles . 3. The four sides of any quadrilateral are together ...
... prove ( 1 ) that AB , BC are greater than AC , and ( 2 ) that AC , CB are greater than AB . 2. Prove the proposition without producing one of the sides by bisecting one of the angles . 3. The four sides of any quadrilateral are together ...
Άλλες εκδόσεις - Προβολή όλων
Euclid, Book I., Propositions I. to XXVI., with Exercises and Alternative ... Euclides Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2016 |
Euclid, Book I., Propositions I. to Xxvi., With Exercises and Alternative ... Euclides Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2023 |
Euclid, Book I., Propositions I. to Xxvi., With Exercises and Alternative ... Euclides Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2023 |
Συχνά εμφανιζόμενοι όροι και φράσεις
A'EF AB is equal AC is equal ACD is greater adjacent angles angle ABC angle ACB angle BAC angle BCD angle BDC greater angle contained angle DEF angle DFE angle EDF angle equal bisects the angle centre circumference constr DEF are equal Demonstration describe the circle draw a straight equal angles equal sides equal to CD equidistant equilateral triangle Euclid exterior angle Find a point four-sided figure given line given point given straight line greater than BC interior opposite angle intersect isosceles triangle less Let ABC line with BC middle point opposite sides perpendiculars let fall point G position be named produced prop PROPOSITION Q.E.D. Exercises quadrilateral right angles shew shewn side AC sides equal straight line drawn take any point THEOREM third side triangle ABC triangle DEF triangles be equal unequal vertical angle
Δημοφιλή αποσπάσματα
Σελίδα 39 - IF two triangles have two sides of the one equal to two sides of the...
Σελίδα 25 - To draw a straight line at right angles to a given straight line, from a given point in the same.
Σελίδα 4 - 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 7 - If a straight line meet two straight lines, so as to make the two interior angles on the same side of it taken together less than two right angles...
Σελίδα 7 - Notions 1. Things which are equal to the same thing are also equal to one another. 2. If equals be added to equals, the wholes are equal. 3. If equals be subtracted from equals, the remainders are equal. 4. Things which coincide with one another are equal to one another.
Σελίδα 36 - 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 37 - ... shall be equal to three given straight lines, but any two whatever of these must be greater than the third.
Σελίδα 18 - Upon the same base, and on the same side of it, there cannot be two triangles that have their sides which are terminated in one extremity of' the base, equal to one another, and likewise those which are terminated in the other extremity.
Σελίδα 29 - 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. At the point B in the straight line AB, let the two straight lines...
Σελίδα 3 - A plane rectilineal angle is the inclination of two straight lines to one another, which meet together, but are not in the same straight line.