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 4
... proposition and its corollaries are established , we are no more entitled to conclude that a quadri- lateral can have four right angles than that it can have four obtuse or four acute ones . The definition above quoted , however , has ...
... proposition and its corollaries are established , we are no more entitled to conclude that a quadri- lateral can have four right angles than that it can have four obtuse or four acute ones . The definition above quoted , however , has ...
Página 5
... propositions he is to take for granted without proof . In this way he is not stopped in his progress to consider whether the point tacitly admitted be established in some previous proposition ; and though it may be said that axioms are ...
... propositions he is to take for granted without proof . In this way he is not stopped in his progress to consider whether the point tacitly admitted be established in some previous proposition ; and though it may be said that axioms are ...
Página 6
... proposition has been demonstrated by some writers in the following manner : E K Let AB be perpendicular to CD , and ... proposition of the first book ; and the student may postpone the consideration of it , till he has proved that ...
... proposition has been demonstrated by some writers in the following manner : E K Let AB be perpendicular to CD , and ... proposition of the first book ; and the student may postpone the consideration of it , till he has proved that ...
Página 7
... PROPOSITIONS . PROPOSITION I. PROBLEM . * - To describe an equilateral triangle on a given finite straight line . † Let AB be the given straight line : it is required to describe an equilateral triangle upon it . From the centre A , at ...
... PROPOSITIONS . PROPOSITION I. PROBLEM . * - To describe an equilateral triangle on a given finite straight line . † Let AB be the given straight line : it is required to describe an equilateral triangle upon it . From the centre A , at ...
Página 8
... proposition of the 3d book , that two circles can eut each other in only two points ; and hence there can be only ... proposition . It is the same in fact as assuming this proposition as an addi- tional postulate . In a science ...
... proposition of the 3d book , that two circles can eut each other in only two points ; and hence there can be only ... proposition . It is the same in fact as assuming this proposition as an addi- tional postulate . In a science ...
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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.