The First Six, and the Eleventh and Twelfth Books of Euclid's Elements: With the Elements of Plane Trigonometry, and an Appendix in Four Books : With Notes and IllustrationsLongmans, Green, 1845 - 352 páginas |
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Página 9
... Schol . By drawing ( I. 2 ) from either extremity of C , a straight line equal to AB , the line C might be produced , till it and the part added would be equal to AB . Also , by producing AB through A , to meet the circumference , a ...
... Schol . By drawing ( I. 2 ) from either extremity of C , a straight line equal to AB , the line C might be produced , till it and the part added would be equal to AB . Also , by producing AB through A , to meet the circumference , a ...
Página 10
... Schol . If the equal sides AB , DE be produced through B and E , the extremities of the bases , the exterior angles CBG , FEH * The following observations may assist the beginner in understanding the proof of this important proposition ...
... Schol . If the equal sides AB , DE be produced through B and E , the extremities of the bases , the exterior angles CBG , FEH * The following observations may assist the beginner in understanding the proof of this important proposition ...
Página 11
... schol . ) the angle ABC is equal to the angle ACB , which are the angles at the base of the triangle ABC : and it has been proved that the angle FBC is equal to the angle GCB , which are the angles upon the other side of the base ...
... schol . ) the angle ABC is equal to the angle ACB , which are the angles at the base of the triangle ABC : and it has been proved that the angle FBC is equal to the angle GCB , which are the angles upon the other side of the base ...
Página 12
... schol . ) the exterior angles DBF , ECF , are D also equal . B P C E Cor . Hence every equilateral triangle is also equiangular . This is shown by taking , first , one side as base , and then another . PROP . VI . THEOR . * If two ...
... schol . ) the exterior angles DBF , ECF , are D also equal . B P C E Cor . Hence every equilateral triangle is also equiangular . This is shown by taking , first , one side as base , and then another . PROP . VI . THEOR . * If two ...
Página 52
... it equal to the half of AB , and producing it through A ; then , to make EF equal to the distance from E to B , and AH equal to AF . It is plain that BD Schol . The line CF is equal to BA and 52 [ BOOK II . THE ELEMENTS.
... it equal to the half of AB , and producing it through A ; then , to make EF equal to the distance from E to B , and AH equal to AF . It is plain that BD Schol . The line CF is equal to BA and 52 [ BOOK II . THE ELEMENTS.
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The First Six and the Eleventh and Twelfth Books of Euclid's Elements: With ... James Thomson, gen,James Euclides Sin vista previa disponible - 2016 |
Términos y frases comunes
ABCD altitude angle ABC angle BAC angle equal BC is equal bisected centre chord circle ABC circumference cone const contained corollary cylinder describe a circle diagonal diameter divided draw equal angles equal to AC equiangular equilateral Euclid exterior angle fore fourth given circle given point given ratio given straight line greater half Hence hypotenuse inscribed join less Let ABC magnitudes manner multiple opposite parallel parallelepiped parallelogram perpendicular polygon polyhedron prism PROB.-To produced PROP proportional proposition pyramid radius rectangle rectilineal figure right angles Schol scholium segments semicircle sides similar solid angles square of AC straight line drawn tangent THEOR.-If third triangle ABC trigonometry triplicate ratio vertex vertical angle wherefore
Pasajes populares
Página 130 - 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 45 - If a straight line be bisected, and produced to any point, the rectangle contained by the whole line thus produced, and the part of it produced, together with the square on half the line bisected, is equal to the square on the straight line which is made up of the half and the part produced.
Página 2 - A rhombus is that which has all its sides equal, but its angles are not right angles.
Página 50 - To divide a given straight line into two parts, so that the rectangle contained by the whole and one of the parts may be equal to the square on the other part.
Página 38 - In any right-angled triangle, the square which is described upon the side subtending the right angle, is equal to the squares described upon the sides which contain the right angle.
Página 7 - If two triangles have two sides of the one equal to two sides of the...
Página 27 - 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 27 - 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.
Página 15 - 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.
Página 36 - To describe a parallelogram equal to a given rectilineal figure, and having an angle equal to a given rectilineal angle. Let ABCD be the given rectilineal figure, and E the given rectilineal angle. It is required to describe a parallelogram equal to ABCD, and having an angle equal to E.