The College Euclid: Comprising the First Six and the Parts of the Eleventh and Twelfth Books Read at the Universities ... By A. K. Isbister1865 |
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Σελίδα 2
... three letters , of which the letter that is at the vertex of the angle , that is , at the point in which the straight lines containing the angle meet one another , is put between the other two letters , and one of these two is somewhere ...
... three letters , of which the letter that is at the vertex of the angle , that is , at the point in which the straight lines containing the angle meet one another , is put between the other two letters , and one of these two is somewhere ...
Σελίδα 3
... straight line , and the circumference it cuts off . XX . Rectilineal figures are those which are contained by straight lines . XXI . Trilateral figures , or triangles , by three straight lines . ΧΧΙΙ . Quadrilateral , by four ...
... straight line , and the circumference it cuts off . XX . Rectilineal figures are those which are contained by straight lines . XXI . Trilateral figures , or triangles , by three straight lines . ΧΧΙΙ . Quadrilateral , by four ...
Σελίδα 8
... the less . D C B E A F CONSTRUCTION From the point A draw the straight line AD equal to C ; ( 1. 2 ) and from the centre A , at the distance AD , describe the circle DEF . ( post . 3. ) Then AE shall be equal to C. DEMONSTRATION Because A ...
... the less . D C B E A F CONSTRUCTION From the point A draw the straight line AD equal to C ; ( 1. 2 ) and from the centre A , at the distance AD , describe the circle DEF . ( post . 3. ) Then AE shall be equal to C. DEMONSTRATION Because A ...
Σελίδα 20
Euclides Alexander Kennedy ISBISTER. DEMONSTRATION Then , since the straight line ... three angles CВА , АВЕ , EBD . ( ax . 2. ) Again , because the angle DBA is ... three angles ; and things which are equal to the same thing are ...
Euclides Alexander Kennedy ISBISTER. DEMONSTRATION Then , since the straight line ... three angles CВА , АВЕ , EBD . ( ax . 2. ) Again , because the angle DBA is ... three angles ; and things which are equal to the same thing are ...
Σελίδα 27
... straight lines to a point within the triangle ; then these shall be less than the other two sides of the triangle ... third side , ( 1. 20 ) therefore the two sides BA , AE , of the triangle ABE , are greater than BE ; to each of these add EC ...
... straight lines to a point within the triangle ; then these shall be less than the other two sides of the triangle ... third side , ( 1. 20 ) therefore the two sides BA , AE , of the triangle ABE , are greater than BE ; to each of these add EC ...
Άλλες εκδόσεις - Προβολή όλων
The College Euclid: Comprising the First Six and the Parts of the Eleventh ... Euclides Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2016 |
Συχνά εμφανιζόμενοι όροι και φράσεις
ABCD AC is equal adjacent angles Æneid angle ABC angle ACB angle BAC angle equal base BC bisect Book centre circle ABC circumference constr DEMONSTRATION diameter double draw English equal angles equal straight lines equal to F equiangular equilateral and equiangular equimultiples Euclid exterior angle four magnitudes fourth given circle given point given rectilineal angle given straight line gnomon Grammar greater ratio inscribed isosceles triangle join less Let ABC multiple opposite angles parallel parallelogram pentagon perpendicular plane polygon proportionals proposition Q. E. D. PROP rectangle contained rectilineal figure References-Prop remaining angle right angles segment similar similar triangles solid angle square of AC straight line AC THEOREM third three straight lines touches the circle triangle ABC twice the rectangle wherefore
Δημοφιλή αποσπάσματα
Σελίδα 140 - 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 xiv - The straight line drawn at right angles to the diameter of a circle, from the extremity of it, falls without the circle...
Σελίδα 310 - 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 equal to two right angles.
Σελίδα 33 - That, if a straight line falling on two straight lines make the interior angles on the same side less than two right angles, the two straight lines, if produced indefinitely, meet on that side on which are the angles less than the two right angles.
Σελίδα vi - If a straight line be divided into any two parts, four times the rectangle contained ~by the whole line and one of the parts, together with the square on the other part, is equal to the square on the straight line which is made up of the whole and that part.
Σελίδα 310 - 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 xxxvii - The areas of two triangles which have an angle of the one equal to an angle of the other are to each other as the products of the sides including the equal angles. D c A' D' Hyp. In triangles ABC and A'B'C', ZA = ZA'. To prove AABC = ABxAC. A A'B'C' A'B'xA'C' Proof. Draw the altitudes BD and B'D'.
Σελίδα 69 - To divide a given straight line into two parts, so that the rectangle contained by the whole and one of the parts, shall be equal to the square of the other part.
Σελίδα 287 - If any point be taken in the diameter of a circle which is not the centre, of all the straight lines which can be drawn from it to the circumference, the greatest is that in which the centre is, and the other part of that diameter is the least...