Elements of geometry, containing books i. to vi.and portions of books xi. and xii. of Euclid, with exercises and notes, by J.H. Smith1876 - 349 σελίδες |
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Αποτελέσματα 1 - 5 από τα 76.
Σελίδα 10
... triangle on a given straight line . D 2 Let AB be the given st . line . It is required to describe an equilat ... ABC be an equilat . A. For A is the centre of BCD , .. AC = AB . Def . 13 . And B is the centre of ACE , .. BC = AB . Def . 13 .
... triangle on a given straight line . D 2 Let AB be the given st . line . It is required to describe an equilat ... ABC be an equilat . A. For A is the centre of BCD , .. AC = AB . Def . 13 . And B is the centre of ACE , .. BC = AB . Def . 13 .
Σελίδα 14
... triangle may be moved from one place , turned over , and put down in another place , without altering the relative ... ABC and DEF to be two given angles . P B B F Suppose the arm BC to be placed on the arm EF , and the vertex B on the vertex ...
... triangle may be moved from one place , turned over , and put down in another place , without altering the relative ... ABC and DEF to be two given angles . P B B F Suppose the arm BC to be placed on the arm EF , and the vertex B on the vertex ...
Σελίδα 16
... triangle ABC , let AC - AB . ( Fig . 1. ) Then must ABC = L ACB . Imagine the △ ABC to be taken up , turned round ... triangles have two angles 16 [ Book I. EUCLID'S ELEMENTS .
... triangle ABC , let AC - AB . ( Fig . 1. ) Then must ABC = L ACB . Imagine the △ ABC to be taken up , turned round ... triangles have two angles 16 [ Book I. EUCLID'S ELEMENTS .
Σελίδα 17
... angles of the one equal to two angles of the other , each to each , and the sides adjacent to the equal angles in each also equal ; then must the triangles be equal in all respects . let ABC = B E In As ABC , DEF , DEF , and ACB = L DFE ...
... angles of the one equal to two angles of the other , each to each , and the sides adjacent to the equal angles in each also equal ; then must the triangles be equal in all respects . let ABC = B E In As ABC , DEF , DEF , and ACB = L DFE ...
Σελίδα 19
... ABC , in su vertex D fal ' A falls ; a CASE T e the given angle . required to bisect BAC . any pt . D. In AC make AE ... triangle , employed in the construc- tion , be described with its vertex towards the given angle ; shew that ...
... ABC , in su vertex D fal ' A falls ; a CASE T e the given angle . required to bisect BAC . any pt . D. In AC make AE ... triangle , employed in the construc- tion , be described with its vertex towards the given angle ; shew that ...
Άλλες εκδόσεις - Προβολή όλων
Elements of Geometry, Containing Books I. to Vi.And Portions of Books Xi ... James Hamblin Smith,Euclides Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2022 |
Elements of Geometry, Containing Books I. to VI.and Portions of Books XI ... James Hamblin Smith,Euclides Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2018 |
Συχνά εμφανιζόμενοι όροι και φράσεις
ABCD angles equal angular points base BC BC=EF bisecting the angle centre chord circumference coincide diagonals diameter divided equal angles equal circles equiangular equilateral triangle equimultiples Eucl Euclid exterior angle given angle given circle given line given point given st given straight line greater than nD Hence inscribed isosceles triangle less Let ABC Let the st lines be drawn magnitudes middle points multiple opposite angles opposite sides parallel parallelogram perpendicular produced Prop prove Q. E. D. Ex Q. E. D. PROPOSITION quadrilateral radius rectangle contained reflex angle required to describe rhombus right angles segment semicircle shew shewn straight line joining subtended sum of sqq tangent THEOREM together=two rt trapezium triangle ABC triangles are equal vertex vertical angle
Δημοφιλή αποσπάσματα
Σελίδα 51 - 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.
Σελίδα 38 - 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. either the sides adjacent to the equal...
Σελίδα 178 - The angle in a semicircle is a right angle; the angle in a segment greater than a semicircle is less than a right angle; and the angle in a segment less than a semicircle is greater than a right angle.
Σελίδα 46 - IF a straight line fall upon two parallel straight lines, it makes the alternate angles equal to one another; and the exterior angle equal to the interior and opposite upon...
Σελίδα 50 - If a side of any triangle be produced, the exterior angle is equal to the two interior and opposite angles; and the three interior angles of every triangle are together equal to two right angles.
Σελίδα 104 - To draw a straight line through a given point parallel to a given straight line. Let A be the given point, and BC the given straight line ; it is required to draw a straight line through the point A, parallel to the straight hue BC.
Σελίδα 187 - To describe an isosceles triangle, having each of the angles at the base double of the third angle.
Σελίδα 89 - In every triangle, the square on the side subtending either of the acute angles, is less than the squares on the sides containing that angle, by twice the rectangle contained by either of these sides, and the straight line intercepted between the acute angle and the perpendicular let fall upon it from the opposite angle, Let ABC be any triangle, and the angle at B one of its acute angles, and upon BC, one of the sides containing it, let fall the perpendicular AD from the opposite angle.
Σελίδα 5 - A circle is a plane figure contained by one line, which is called the circumference, and is such that all straight lines drawn from a certain point within the figure to the circumference, are equal to one another.
Σελίδα 5 - A diameter of a circle is a straight line drawn through the centre, and terminated both ways by the circumference.