Elements of Geometry;: Containing the First Six Books of Euclid, with Two Books on the Geometry of Solids. To which are Added, Elements of Plane and Spherical TrigonometryBell & Bradfute, and G. G. & J. Robinson, London., 1795 - 400 páginas |
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Página vii
... not materially differ from them , and which anfwer exactly the fame pur- pofe . Some propofitions also have been added ; but , for a fuller detail concerning thefe changes , I must refer to the notes , in which several a 4 I PREFACE . vii.
... not materially differ from them , and which anfwer exactly the fame pur- pofe . Some propofitions also have been added ; but , for a fuller detail concerning thefe changes , I must refer to the notes , in which several a 4 I PREFACE . vii.
Página 5
... its fides are not equal , nor its angles right angles . XXIX . All other four fided figures befides thefe , are called Tra- peziums . Book L. Book I. XXX . Parallel ftraight lines , are fuch XXX . OF GEOMETRY . XXIV. ...
... its fides are not equal , nor its angles right angles . XXIX . All other four fided figures befides thefe , are called Tra- peziums . Book L. Book I. XXX . Parallel ftraight lines , are fuch XXX . OF GEOMETRY . XXIV. ...
Página 17
... the ftraight line AB make with CD , upon one fide of it , the angles CBA , ABD ; thefe are either two light angles , or are together equal to two right angles . C For " Book I. been proved to be greater than the fame OF GEOMETRY . 17.
... the ftraight line AB make with CD , upon one fide of it , the angles CBA , ABD ; thefe are either two light angles , or are together equal to two right angles . C For " Book I. been proved to be greater than the fame OF GEOMETRY . 17.
Página 17
... the ftraight line AB make with CD , upon one fide of it , the angles CBA , ABD ; thefe are either two light angles , or are together equal to two right angles . C For Book I. For , if the angle CBA be equal OF GEOMETRY . 17.
... the ftraight line AB make with CD , upon one fide of it , the angles CBA , ABD ; thefe are either two light angles , or are together equal to two right angles . C For Book I. For , if the angle CBA be equal OF GEOMETRY . 17.
Página 18
... thefe equals ; therefore the angles CBE , EBD are equal to the three angles CBA , ABE , EBD . Again , because the angle DBA is equal to the two angles DBE , EBA , add to thefe equals the angle ABC ; therefore the angles DBA , ABC are ...
... thefe equals ; therefore the angles CBE , EBD are equal to the three angles CBA , ABE , EBD . Again , because the angle DBA is equal to the two angles DBE , EBA , add to thefe equals the angle ABC ; therefore the angles DBA , ABC are ...
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Elements of Geometry: Containing the First Six Books of Euclid, with a ... Formerly Chairman Department of Immunology John Playfair Sin vista previa disponible - 2015 |
Términos y frases comunes
ABCD adjacent angles alfo alfo equal alſo angle ABC angle ACB angle BAC arch bafe baſe BC is equal becauſe the angle bifected Book VII cafe centre circle ABC circumference co-fine defcribed demonftrated diameter draw drawn equal angles equiangular equilateral equilateral polygon equimultiples Euclid exterior angle faid fame manner fame ratio fame reaſon fecond fection fegment femicircle fhewn fimilar fince firft firſt folid fore fquare of AC ftraight line AB fuch given ſtraight line greater impoffible infcribed interfection join lefs leſs Let ABC line BC magnitudes muſt oppofite angle parallel parallelepiped parallelogram perpendicular polygon prifm propofition proportionals radius rectangle contained rectilineal figure remaining angle right angles ſpace ſpherical triangle ſquare tangent thefe THEOR theſe thoſe touches the circle triangle ABC wherefore
Pasajes populares
Página 18 - 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 155 - 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 17 - 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 9 - Wherefore, from the given point A, a straight line AL has been drawn equal to the given straight line BC.
Página 3 - 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 23 - Therefore all the angles of the figure, together with four right angles, are equal to twice as many right angles as the figure has sides.
Página 12 - ABC: and it has also been proved that the angle FBC is equal to the angle GCB, which are the angles upon the other side of the base. Therefore the angles at the base, &c.
Página 6 - Let it be granted that a straight line may be drawn from any one point to any other point.
Página 156 - But by the hypothesis, it is less than a right angle ; which is absurd. Therefore the angles ABC, DEF are not unequal, that is, they are equal : And the angle at A is equal to the angle at D ; wherefore...
Página 44 - 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...