Elements of Geometry: Containing the First Six Books of Euclid, with a Supplement on the Quadrature of the Circle, and the Geometry of Solids; to which are Added Elements of Plane and Spherical Trigonometry |
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Side 42
All the interior angles of any rectilineal figure are equal to twice as many right
angles as the figure has sides , wanting four right angles . For any rectilineal
figure ABCDE can be divided into as many triangles as the figure has sides , by
drawing ...
All the interior angles of any rectilineal figure are equal to twice as many right
angles as the figure has sides , wanting four right angles . For any rectilineal
figure ABCDE can be divided into as many triangles as the figure has sides , by
drawing ...
Side 110
If four magnitudes are continual proportionals , the ratio of the first to the fourth is
said to be triplicate of the ratio of the first to the second , or of the ratio of the
second to the third , & c . " So also , if there are five continual proportionals ; the
ratio ...
If four magnitudes are continual proportionals , the ratio of the first to the fourth is
said to be triplicate of the ratio of the first to the second , or of the ratio of the
second to the third , & c . " So also , if there are five continual proportionals ; the
ratio ...
Side 137
If four straight lines be proportionals , the rectangle contained by the extremes is
equal to the rectangle contained by the means : And if the rectangle contained by
the extremes be equal to the rectangle contained by means , the four straight ...
If four straight lines be proportionals , the rectangle contained by the extremes is
equal to the rectangle contained by the means : And if the rectangle contained by
the extremes be equal to the rectangle contained by means , the four straight ...
Side 222
and therefore also , the angle ABC is to four times the anE gle ABD as the arch
AC to four times K B the arch AD ( 4. 5. ) ; But ABD is a right angle , and therefore
four times the arch AD is equal to the whole circumference ACF ; therefore , the ...
and therefore also , the angle ABC is to four times the anE gle ABD as the arch
AC to four times K B the arch AD ( 4. 5. ) ; But ABD is a right angle , and therefore
four times the arch AD is equal to the whole circumference ACF ; therefore , the ...
Side 308
Then , because the line CD has turned about one of its extremities till it has come
G into the position CD again , it has by the corollary to the above definition
described angles which are together equal to four right angles ; but the angles
which ...
Then , because the line CD has turned about one of its extremities till it has come
G into the position CD again , it has by the corollary to the above definition
described angles which are together equal to four right angles ; but the angles
which ...
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Elements of Geometry: Containing the First Six Books of Euc, With a ... Formerly Chairman Department of Immunology John Playfair,John Playfair Ingen forhåndsvisning tilgjengelig - 2017 |
Vanlige uttrykk og setninger
ABCD altitude angle ABC angle BAC arch base bisected Book called centre circle circle ABC circumference coincide common cosine cylinder definition demonstrated described diameter difference divided double draw drawn equal equal angles equiangular Euclid extremity fall fore four fourth given given straight line greater half inscribed interior join less Let ABC magnitudes manner meet multiple opposite parallel parallelogram pass perpendicular plane polygon prism produced PROP proportionals proposition proved Q. E. D. PROP radius ratio reason rectangle contained rectilineal figure right angles segment shewn sides similar sine solid square straight line taken tangent THEOR thing third touches triangle ABC wherefore whole
Populære avsnitt
Side 56 - 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.
Side 19 - 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.
Side 33 - THE greater angle of every triangle is subtended by the greater side, or has the greater side opposite to it.
Side 62 - In every triangle, the square on the side subtending either of the acute angles, is less than the squares on the sides containing that angle, by twice the rectangle contained by either of these sides, and the straight line intercepted between the...
Side 62 - In obtuse-angled triangles, if a perpendicular be drawn from either of the acute angles to the opposite side produced, the square of the side subtending the obtuse angle, is greater than the squares of the sides containing the obtuse angle, by twice the rectangle contained by the side upon which, when produced, the perpendicular falls, and the straight line intercepted without the triangle, between the perpendicular and the obtuse angle. Let ABC be an obtuse-angled triangle, having the obtuse angle...
Side 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.
Side 76 - THE diameter is the greatest straight line in a circle; and, of all others, that which is nearer to the centre is always greater than one more remote ; and the greater is nearer to the centre than the less.* Let ABCD be a circle, of which...
Side 36 - IF two triangles have two sides of the one equal to two sides of the other, each to each, but the angle contained by the two sides of one of them greater than the angle contained by the two sides equal to them, of the other ; the base of that which has the greater angle shall be greater than the base of the other.
Side 18 - When a straight line standing on another straight line makes the adjacent angles equal to one another, each of the angles is called a right angle ; and the straight line which stands on the other is called a perpendicular to it.
Side 55 - If a straight line be divided into any two parts, the rectangle contained by the whole and one of the parts, is equal to the rectangle contained by the two parts, together with the square of the aforesaid part.
Bibliografisk informasjon
| Tittel | Elements of Geometry: Containing the First Six Books of Euclid, with a Supplement on the Quadrature of the Circle, and the Geometry of Solids; to which are Added Elements of Plane and Spherical Trigonometry |
| Forfatter | John Playfair |
| Redaktør | John Playfair |
| oversatt av | John Playfair |
| Utgave | 5 |
| Utgiver | G. Long, 1819 |
| Original fra | University of Michigan |
| Digitalisert | 11. jun 2007 |
| Lengde | 333 sider |
| Eksporter sitat | BiBTeX EndNote RefMan |