The First Six Books of the Elements of Euclid: With NotesPrinted at the University Press, for R. Milliken and son, 1833 - 183 páginas |
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Página 64
... tangent through any given point B in the circumference of a circle ; draw through that point a diameter AB , and erect at the extremity of it a perpendicular BF . Cor . 2. If the line CD be produced beyond its extremity C , and there be ...
... tangent through any given point B in the circumference of a circle ; draw through that point a diameter AB , and erect at the extremity of it a perpendicular BF . Cor . 2. If the line CD be produced beyond its extremity C , and there be ...
Página 65
... tangent to the circle . Let C be the centre of the given circle ; and from the centre C , with the radius ČA , describe a circle CAE : draw CA meeting the circle in the point F , and draw through the point F the line FE per- pendicular ...
... tangent to the circle . Let C be the centre of the given circle ; and from the centre C , with the radius ČA , describe a circle CAE : draw CA meeting the circle in the point F , and draw through the point F the line FE per- pendicular ...
Página 66
... tangent to a circle , the right line ( BA ) , drawn perpendicular to it from the point of contact , passes through the centre of the circle . For , if it be possible , let the centre Z be without the line BA ; and draw ZB . Because the ...
... tangent to a circle , the right line ( BA ) , drawn perpendicular to it from the point of contact , passes through the centre of the circle . For , if it be possible , let the centre Z be without the line BA ; and draw ZB . Because the ...
Página 73
... tangent to a circle from a given point without it : draw a right line from the given point to the centre of the circle ; bisect it , and from the point of bisection as a centre describe a circle through the given point ; the right line ...
... tangent to a circle from a given point without it : draw a right line from the given point to the centre of the circle ; bisect it , and from the point of bisection as a centre describe a circle through the given point ; the right line ...
Página 74
... tangent FF ; and join BC . Because the right line EF is a tangent to the circle , and AB is drawn through the point of contact perpen- ( 2 ) Prop.19 . dicular to it , AB passes through the centre ( 2 ) , and ( 3 ) Prop.31 . therefore ...
... tangent FF ; and join BC . Because the right line EF is a tangent to the circle , and AB is drawn through the point of contact perpen- ( 2 ) Prop.19 . dicular to it , AB passes through the centre ( 2 ) , and ( 3 ) Prop.31 . therefore ...
Términos y frases comunes
absurd AC and BD AC and CB AC is equal angle ABC angle ACD angle BAC angle equal base bisected centre circumference Constr constructed contained in CD demonstrated described double the rectangle double the square drawn equal angles equal to AC equal to double equi equi-multiples equi-submultiples equiangular Euclid evident external angle fore form one right four magnitudes proportional four right angles fourth given angle given circle given line given right line given triangle gles half a right Hypoth inscribed less line CD manner multiple oftener opposite parallel parallelogram perpendicular PROB produced Prop proposition radius rectangle under AC right angles right line AB Schol segment side AC sides AB similar squares of AC submultiple taken tangent THEOR third tiple triangle ABC vertex
Pasajes populares
Página 147 - A plane rectilineal angle is the inclination of two straight lines to one another, which meet together, but are not in the same straight line.
Página 3 - Things which are equal to the same thing are equal to one another. 2. If equals be added to equals, the wholes are equal. 3. If equals be taken from equals, the remainders are equal. 4. If equals be added to unequals, the wholes are unequal. 5. If equals be taken from unequals, the remainders are unequal. 6. Things which are double of the same are equal to one another.
Página 22 - 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 16 - If two triangles have two sides of the one respectively equal to two sides of the other, and the contained angles supplemental, the two triangles are equal.
Página 148 - 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 2 - A diameter of a circle is a straight line drawn through the centre, and terminated both ways by the circumference.
Página 92 - F) a ratio compounded of the ratios which the first has to the second, the second to the third, the third to the fourth (A to D, D to C, and C to F) ; and so on to the last.
Página 93 - AXIOMS. 1. Equimultiples of the same, or of equal magnitudes, are equal to one another. 2. Those magnitudes, of which the same or equal magnitudes are equimultiples, are equal to one another. 3. A multiple of a greater magnitude is greater than the same multiple of a less. 4. That magnitude, of which a multiple is greater than the same multiple of another, is greater than that other magnitude.
Página 25 - DE : but equal triangles on the same base and on the same side of it, are between the same parallels ; (i.
Página 2 - 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.