Euclid's Elements of Geometry, Libros 1-6Henry Martyn Taylor The University Press, 1893 - 504 páginas |
Dentro del libro
Resultados 1-5 de 36
Página 169
... line DCE pass through the point C , but do not intersect there : they touch at the point C , and DE is a tangent to the circle at the point C. B Q 包 E T. E. 12 In the diagram the circles PRS , QRS meet at DEFINITIONS . 169.
... line DCE pass through the point C , but do not intersect there : they touch at the point C , and DE is a tangent to the circle at the point C. B Q 包 E T. E. 12 In the diagram the circles PRS , QRS meet at DEFINITIONS . 169.
Página 213
... tangent at B , AB bisects the angle CAP . 5. Prove that although no straight line can be drawn to pass between a circle and its tangent , yet any number of circles can be described to do so . 6. Circles , which have a common tangent at ...
... tangent at B , AB bisects the angle CAP . 5. Prove that although no straight line can be drawn to pass between a circle and its tangent , yet any number of circles can be described to do so . 6. Circles , which have a common tangent at ...
Página 214
... tangent to the circle ABC . First , let the point D be on the circle . CONSTRUCTION . Find the centre E ; ( Prop , 5. ) draw ED , and draw DF at right angles to DE ; ( I. Prop . 11. ) then DF is a tangent drawn as re- quired . PROOF ...
... tangent to the circle ABC . First , let the point D be on the circle . CONSTRUCTION . Find the centre E ; ( Prop , 5. ) draw ED , and draw DF at right angles to DE ; ( I. Prop . 11. ) then DF is a tangent drawn as re- quired . PROOF ...
Página 215
... tangent to the circle ABC at G. E A Both the construction in the Proposition and the alternative con- struction point out that two and only two tangents can be drawn to a circle through an external point , one through a point on the ...
... tangent to the circle ABC at G. E A Both the construction in the Proposition and the alternative con- struction point out that two and only two tangents can be drawn to a circle through an external point , one through a point on the ...
Página 216
... DCE were not at right angles to CF , DCE would cut the circle ( Prop . 16 ) ; but it does not : therefore DCE is at right angles to CF. Wherefore , if a straight line & c . THE TANGENT AS THE LIMIT OF THE SECANT . Let 216 BOOK III .
... DCE were not at right angles to CF , DCE would cut the circle ( Prop . 16 ) ; but it does not : therefore DCE is at right angles to CF. Wherefore , if a straight line & c . THE TANGENT AS THE LIMIT OF THE SECANT . Let 216 BOOK III .
Otras ediciones - Ver todas
Términos y frases comunes
ABCD AC is equal ADDITIONAL PROPOSITION angle ACB angle BAC angles ABC anharmonic arc ABC bisected centre of similitude chord circle ABC coincide Constr Coroll cut the circle describe a circle diagonal diameter draw equal angles equal circles equal to CD equiangular equimultiples Euclid EXERCISES exterior angle given circle given point given straight line given triangle greater harmonic range hypotenuse inscribed intersect Let ABC meet middle points opposite sides pair parallel parallelogram pencil pentagon perpendicular polygon PROOF Prop PROPOSITION 14 Ptolemy's Theorem quadrilateral radical axis radius rectangle contained required to prove respectively rhombus right angles shew sides BC Similarly square on AC straight line &c straight line drawn straight line joining subtend tangent theorem triangle ABC triangle DEF triangles are equal twice the rectangle vertices Wherefore
Pasajes populares
Página 59 - Any two sides of a triangle are together greater than the third side.
Página 7 - An angle less than a right angle is called an acute angle; an angle greater than a right angle and less than two right angles is called an obtuse angle.
Página 68 - 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.
Página 144 - 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...
Página 376 - To find a mean proportional between two given straight lines. Let AB, BC be the two given straight lines ; it is required to find a mean proportional between them. Place AB, BC in a straight line, and upon AC describe the semicircle ADC, and from the point B draw (9.
Página 135 - If there be two straight lines, one of which is divided into any number of parts, the rectangle contained by the two straight lines is equal to the rectangles contained by the undivided line, and the several parts of the divided line.
Página 76 - ... the same side together equal to two right angles ; the two straight lines shall be parallel to one another.
Página 305 - To inscribe, an equilateral and equiangular pentagon in a given circle. Let ABCDE be the given circle. It is required to inscribe an equilateral...
Página 424 - PROPOSITION 5. The locus of a point, the ratio of whose distances from two given points is constant, is a circle*.
Página 248 - If two straight lines within a circle cut one another, the rectangle contained by the segments of one of them is equal to the rectangle contained by the segments of the other. Let the two straight lines AC, BD, within the circle ABCD, cut one another in the point E : the rectangle contained by AE, EC is equal to the rectangle contained by BE, ED.