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 4
... square is that which has all its fides equal , and all its angles right angles . □□ ΧΧΧΙ . An oblong is that which has all its angles right angles , but has not all its fides equal . XXXII . A rhombus is that which has all its fides ...
... square is that which has all its fides equal , and all its angles right angles . □□ ΧΧΧΙ . An oblong is that which has all its angles right angles , but has not all its fides equal . XXXII . A rhombus is that which has all its fides ...
Seite 40
... square upon a given straight line . Let AB be the given straight line ; it is required to defcribe a square upon AB . From the point A draw AC at right angles to AB ; and make b . 3. 1 . b AD equal to AB , and thro ' the point D draw DE ...
... square upon a given straight line . Let AB be the given straight line ; it is required to defcribe a square upon AB . From the point A draw AC at right angles to AB ; and make b . 3. 1 . b AD equal to AB , and thro ' the point D draw DE ...
Seite 41
... square GB . and in the fame manner , by joining AE , BK , it is demonftrated that the parallelogram CL is equal to the square HC . Therefore the whole square BDEC is equal to the two squares GB , HC . and the square BDEC is defcribed ...
... square GB . and in the fame manner , by joining AE , BK , it is demonftrated that the parallelogram CL is equal to the square HC . Therefore the whole square BDEC is equal to the two squares GB , HC . and the square BDEC is defcribed ...
Seite 42
... square defcribed upon BC one of the fides of the triangle ABC be equal to the squares upon the other fides BA , AC ... square of DA is equal to the square D of AB ; to each of these add the square of AC , therefore the squares of ...
... square defcribed upon BC one of the fides of the triangle ABC be equal to the squares upon the other fides BA , AC ... square of DA is equal to the square D of AB ; to each of these add the square of AC , therefore the squares of ...
Seite 44
... square of the whole line . Let the straight line AB be divided into A any two parts in the point C ; the rectangle contained by AB , BC together with the rectangle * AB , AC shall be equal to the square of AB . Upon AB describe the square ...
... square of the whole line . Let the straight line AB be divided into A any two parts in the point C ; the rectangle contained by AB , BC together with the rectangle * AB , AC shall be equal to the square of AB . Upon AB describe the square ...
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alfo alſo angle ABC angle BAC bafe baſe BC is equal BC is given becauſe the angle becauſe the ratio biſected Book XI cafe cauſe circle ABCD circumference cone conſtruction cylinder demonftrated deſcribed diameter drawn equal angles equiangular equimultiples Euclid exceſs fame multiple fame ratio fame reaſon fides fimilar firſt folid angle fore given angle given in magnitude given in poſition given in ſpecies given magnitude given ratio given ſtraight line gnomon greater join leſs Let ABC likewife oppoſite parallel parallelepipeds parallelogram perpendicular priſms Propofition proportionals pyramid Q. E. D. PROP rectangle rectangle contained rectilineal figure right angles ſame ſecond ſegment ſhall ſhewn ſide ſpace ſphere ſquare of AC ſtraight line AB ſtraight line BC THEOR theſe thoſe tiple triangle ABC vertex 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.