Elements of Geometry: Containing Books 1. to Vi. and Portions of Books Xi. and Xii. of Euclid with Exercises and NotesRivingtons, 1879 - 349 páginas Copy owned by Florence Exton, principle of the college from 1920-1923, when she died unexpectedly in office. |
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Página 3
... vertex of the angle ( or angles ) , and the lines are called the arms of the angle ( or angles ) . H B D E F द K Thus , if the lines OA , OB are terminated at the same point O , they form an angle , which is called the angle at O , or ...
... vertex of the angle ( or angles ) , and the lines are called the arms of the angle ( or angles ) . H B D E F द K Thus , if the lines OA , OB are terminated at the same point O , they form an angle , which is called the angle at O , or ...
Página 14
... vertices coincide in position and their arms in direction : and two triangles are equal , if they can be so placed that ... vertex E. Then , if the arm BA coincide in direction with the arm ED , the angle ABC is equal to DEF . If BA fall ...
... vertices coincide in position and their arms in direction : and two triangles are equal , if they can be so placed that ... vertex E. Then , if the arm BA coincide in direction with the arm ED , the angle ABC is equal to DEF . If BA fall ...
Página 16
... from the other sides by being called the Base , the angular point op- posite to that side is called the Vertex of the triangle . PROPOSITION B. THEOREM . If two triangles have two angles 16 [ Book I. EUCLID'S ELEMENTS .
... from the other sides by being called the Base , the angular point op- posite to that side is called the Vertex of the triangle . PROPOSITION B. THEOREM . If two triangles have two angles 16 [ Book I. EUCLID'S ELEMENTS .
Página 18
... vertex D falls on the side of BC opposite to the side on which A falls ; and join AD . CASE I. When AD passes ... vertices 18 [ Book I. EUCLID'S ELEMENTS .
... vertex D falls on the side of BC opposite to the side on which A falls ; and join AD . CASE I. When AD passes ... vertices 18 [ Book I. EUCLID'S ELEMENTS .
Página 19
... vertices does not pass through BC . B ם . Then in △ ABD , ·· BD = BA , : . △ BAD = △ BDA , And in △ ACD , ::: CD = CA , .. △ CAD = △ CDA , Hence since the whole angles BAD , BDA are equal . I. A. I. A. Ax . 3 . and parts of these ...
... vertices does not pass through BC . B ם . Then in △ ABD , ·· BD = BA , : . △ BAD = △ BDA , And in △ ACD , ::: CD = CA , .. △ CAD = △ CDA , Hence since the whole angles BAD , BDA are equal . I. A. I. A. Ax . 3 . and parts of these ...
Otras ediciones - Ver todas
Elements of Geometry, Containing Books I. to VI. and Portions of Books XI ... Euclid Vista completa - 1879 |
Elements of Geometry: Containing Books I to VI and Portions of Books XI and ... Thomas Kirkland,J Hamblin 1829-1901 Smith Sin vista previa disponible - 2015 |
Elements of Geometry Containing Books I to VI and Portions of Books XI and ... J. Hamblin Smith,Thos Kirkland Sin vista previa disponible - 2018 |
Términos y frases comunes
AB=DE ABCD AC=DF angles equal angular points base BC BC=EF centre chord circumference coincide described diagonals diameter divided equal angles equiangular equilateral triangle equimultiples Eucl Euclid exterior angle given angle given circle given line given point given st given straight line greater Hence hypotenuse inscribed intersect isosceles triangle less Let ABC Let the st lines be drawn magnitudes middle points multiple opposite angles opposite sides parallel parallelogram pentagon perpendicular plane polygon produced Prop prove Q. E. D. Ex Q. E. D. PROPOSITION quadrilateral radius ratio rectangle contained reflex angle rhombus right angles segment shew shewn square subtended sum of sqq Take any pt tangent THEOREM together=two rt trapezium triangle ABC triangle be equal vertex vertical angle
Pasajes populares
Página 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.
Página 176 - 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.
Página 40 - 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...
Página 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.
Página 45 - IF a straight line fall upon two parallel straight lines, it makes the alternate angles equal to one another...
Página 88 - In obtuse-angled triangles, if a perpendicular be drawn from either of the acute angles to the opposite side produced, the square on the side 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...
Página 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.
Página 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.
Página 42 - 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.
Página 87 - 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.