The synoptical Euclid; being the first four books of Euclid's Elements of geometry, with exercises, by S.A. Good |
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Página 2
An obtuse angle is that which is greater than a right angle . XII . An acute angle is that which is less than a right angle . XIII . “ A term or boundary is the extremity of any thing . " XIV . A figure is that which is inclosed by 2 ...
An obtuse angle is that which is greater than a right angle . XII . An acute angle is that which is less than a right angle . XIII . “ A term or boundary is the extremity of any thing . " XIV . A figure is that which is inclosed by 2 ...
Página 6
The whole is greater than its part . X. Two straight lines cannot inclose a space . XI . All right angles are equal to one another . XII . “ If a straight line meet two straight lines , so as to make the two interior angles on the same ...
The whole is greater than its part . X. Two straight lines cannot inclose a space . XI . All right angles are equal to one another . XII . “ If a straight line meet two straight lines , so as to make the two interior angles on the same ...
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From the greater of two given straight lines to cut off a part equal to the less . Let AB and C be the two given straight lines , whereof AB is the greater . It is required to cut off from AB , the greater , a part equal to C , the less ...
From the greater of two given straight lines to cut off a part equal to the less . Let AB and C be the two given straight lines , whereof AB is the greater . It is required to cut off from AB , the greater , a part equal to C , the less ...
Página 11
A D B For if AB be not equal to AC , one of them is greater than the other . Let AB be the greater , and from it cut off ( I. 3. ) DB equal to AC , the less , and join DČ . Therefore because in the triangles DBC , ACB , DB is equal to ...
A D B For if AB be not equal to AC , one of them is greater than the other . Let AB be the greater , and from it cut off ( I. 3. ) DB equal to AC , the less , and join DČ . Therefore because in the triangles DBC , ACB , DB is equal to ...
Página 12
But the angle ACD is greater than the angle BCD ( Ax . 9. ) ; therefore also 2 . The angle ADC is greater than BCD ; much more then 3 . The angle BDC is greater than the angle BCD . Again , because CB is equal to DB , ( I. 5. ) 4 .
But the angle ACD is greater than the angle BCD ( Ax . 9. ) ; therefore also 2 . The angle ADC is greater than BCD ; much more then 3 . The angle BDC is greater than the angle BCD . Again , because CB is equal to DB , ( I. 5. ) 4 .
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Términos y frases comunes
ABCD AC is equal AF is equal angle ABC angle ACB angle BAC angle BCD angle equal base base BC bisected centre circle ABC circumference coincide common demonstrated describe diameter distance divided double draw equal angles exterior angle extremity fall figure four given circle given point given straight line given triangle gnomon greater impossible inscribed join less Let ABC likewise manner meet opposite angles parallel parallelogram pass pentagon perpendicular point F PROBLEM produced Q.E.D. PROP reason rectangle contained rectilineal figure remaining angle required to describe right angles segment semicircle shown sides square of AC straight line AC THEOREM touches the circle triangle ABC twice the rectangle wherefore whole
Pasajes populares
Página 26 - 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 22 - If from the ends of a side of a triangle, there be drawn two straight lines to a point within the triangle, these shall be less than the other two sides of the triangle, but shall contain a greater angle.
Página 32 - 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 1 - A plane superficies is that in which any two points being taken, the straight line between them lies wholly in that superficies. vm. "A plane angle is the inclination of two lines to one another in a plane, which meet together, but are not in the same direction.
Página 97 - If from any point without a circle two straight lines be drawn, one of which cuts the circle, and the other touches it ; the rectangle contained by the whole line which cuts the circle, and the part of it without the circle, shall be equal to the square of the line which touches it.
Página 7 - AB; but things which are equal to the same are equal to one another...
Página 14 - To bisect a given finite straight line, that is, to divide it into two equal parts. Let AB be the given straight line : it is required to divide it intotwo equal parts.
Página 53 - 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.
Página 41 - To a given straight line to apply a parallelogram, which shall be equal to a given triangle, and have one of its angles equal to a given rectilineal angle.
Página 52 - 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...
Información bibliográfica
| Título | The synoptical Euclid; being the first four books of Euclid's Elements of geometry, with exercises, by S.A. Good |
| Autor | Euclides |
| Editor | Samuel A Good |
| Publicado | 1853 |
| Procedencia del original | Universidad de Oxford |
| Digitalizado | 7 Sep. 2006 |
| Exportar cita | BiBTeX EndNote RefMan |