The Elements of Euclid: The Errors, by which Theon, Or Others, Have Long Ago Vitiated These Books, are Corrected and Some of Euclid's Demonstrations are Restored. Also, to this Second Edition is Added the Book of Euclid's Data. In Like Manner Corrected. viz. the first six books, together with the eleventh and twelfthR. and A. Foulis, 1762 - 466 Seiten |
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Seite 3
... thro ' the center , afid See N terminated both ways by the circumference . XVIII . A femicircle is the figure contained by a diameter and the part of the circumference cut off by the diameter . XIX . A fegment of a circle is the figure ...
... thro ' the center , afid See N terminated both ways by the circumference . XVIII . A femicircle is the figure contained by a diameter and the part of the circumference cut off by the diameter . XIX . A fegment of a circle is the figure ...
Seite 28
... thro ' a given point parallel to a given straight line . E A F Let A be the given point , and BC the given ftraight line ; it is required to draw a straight line thro ' the point A , parallel to the straight line BC . In BC take any ...
... thro ' a given point parallel to a given straight line . E A F Let A be the given point , and BC the given ftraight line ; it is required to draw a straight line thro ' the point A , parallel to the straight line BC . In BC take any ...
Seite 29
... thro ' the given point A parallel to the given straight line BC . Book I. Which was to be done . PROP . XXXII . THEOR . IF a fide of any triangle be produced , the exterior angle is equal to the two interior and oppofite angles ; and ...
... thro ' the given point A parallel to the given straight line BC . Book I. Which was to be done . PROP . XXXII . THEOR . IF a fide of any triangle be produced , the exterior angle is equal to the two interior and oppofite angles ; and ...
Seite 33
... thro ' B a draw BE parallel to CA ; and thro ' C draw CF parallel to BD . therefore each of the B C a . 31. f . b figures EBCA , DBCF is a parallelogram ; and EBCA is equal to b . 35. 1 : DBCF , because they are upon the fame bafe BC ...
... thro ' B a draw BE parallel to CA ; and thro ' C draw CF parallel to BD . therefore each of the B C a . 31. f . b figures EBCA , DBCF is a parallelogram ; and EBCA is equal to b . 35. 1 : DBCF , because they are upon the fame bafe BC ...
Seite 34
... thro ' B draw BG a . 31. i . parallel to CA , and thro ' F draw FH parallel to ED . then each of the figures GBCA , DEFH is a parallelo- gram ; and they are b . 36. 1. equal b to one ano- ther , because they are upon equal bafes BC , EF ...
... thro ' B draw BG a . 31. i . parallel to CA , and thro ' F draw FH parallel to ED . then each of the figures GBCA , DEFH is a parallelo- gram ; and they are b . 36. 1. equal b to one ano- ther , because they are upon equal bafes BC , EF ...
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alfo alſo angle ABC angle BAC bafe baſe BC is equal BC is given becauſe the angle becauſe the ratio bifected Book XI cafe circle ABCD circumference cone confequently conftruction cylinder defcribed demonftrated drawn equal angles equiangular equimultiples Euclid excefs faid fame multiple fame ratio fame reaſon fecond fegment fhall fhewn fides fimilar firft firſt folid angle fome fore fquare of BC given angle given in fpecies given in magnitude given in pofition given magnitude given ratio given ſtraight line gnomon greater join lefs leſs Let ABC likewife line BC muſt oppofite parallel parallelepipeds parallelogram perpendicular polygon prifms Propofition proportionals pyramid Q. E. D. PROP reafon rectangle rectangle contained rectilineal figure right angles ſhall ſphere ſquare ſtraight line AB thefe THEOR theſe thro tiple triangle ABC wherefore
Beliebte Passagen
Seite 5 - Let it be granted that a straight line may be drawn from any one point to any other point.
Seite 163 - 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.
Seite 48 - If a straight line be divided into any two parts, the squares of the whole line, and of one of the parts, are equal to twice the rectangle contained by the whole and that part, together with the square of the other part. Let the straight line AB be divided into any two parts in the point C; the squares of AB, BC are equal to twice the rectangle AB, BC, together with the square of AC.
Seite 73 - The straight line drawn at right angles to the diameter of a circle, from the extremity of it, falls without the circle; and no straight line can be drawn from the extremity between that straight line and the circumference, so as not to cut the circle...
Seite 105 - 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...
Seite 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.
Seite 167 - Similar triangles are to one another in the duplicate ratio of their homologous sides.
Seite 54 - AB be the given straight line ; it is required to divide it 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.
Seite 47 - If a straight line be divided into two equal parts, and also into two unequal parts; the rectangle contained by the unequal parts, together with the square of the line between the points of section, is equal to the square of half the line.
Seite 37 - To describe a parallelogram that shall be equal to a given triangle, and have one of its angles equal to a given rectilineal angle.