The First Six Books of the Elements of Euclid: With NotesPrinted at the University Press, for R. Milliken and son, 1833 - 183 Seiten |
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Seite 1
... vertex ; or by three letters , of which the middle one is at the vertex , the others any where along the sides . 11. When a right line standing on another makes Fig . 3 . the adjacent angles ( ABC and ABD ) equal to one another , each ...
... vertex ; or by three letters , of which the middle one is at the vertex , the others any where along the sides . 11. When a right line standing on another makes Fig . 3 . the adjacent angles ( ABC and ABD ) equal to one another , each ...
Seite 7
... vertex of each of the triangles be with- out the other triangle , and draw CD . ( 2 ) Prop . 5 . ( 3 ) Ax . 9 . Because the sides AD and AC of the triangle CAD are equal ( 1 ) , the angles ACD and ADC are equal ( 1 ) Hypoth . ( 2 ) ...
... vertex of each of the triangles be with- out the other triangle , and draw CD . ( 2 ) Prop . 5 . ( 3 ) Ax . 9 . Because the sides AD and AC of the triangle CAD are equal ( 1 ) , the angles ACD and ADC are equal ( 1 ) Hypoth . ( 2 ) ...
Seite 8
... vertex of one of them be within the other . Thirdly . Let the vertex D of one triangle be on the side of the other AC ; and it is evident that the sides AC and AD are not equal . Therefore in no case can two triangles , whose ...
... vertex of one of them be within the other . Thirdly . Let the vertex D of one triangle be on the side of the other AC ; and it is evident that the sides AC and AD are not equal . Therefore in no case can two triangles , whose ...
Seite 14
... vertex of any triangle BAD , to the base BC , it will be less than the greater of the sides containing the angle BAC , if those sides be unequal ; or than either of them , if they be equal . Let the side AB be greater than AC or equal ...
... vertex of any triangle BAD , to the base BC , it will be less than the greater of the sides containing the angle BAC , if those sides be unequal ; or than either of them , if they be equal . Let the side AB be greater than AC or equal ...
Seite 18
... vertex perpendicular to the base , bisects the base and the vertical angle . For in the triangles , ABD , CBD , the angles A and ADB are respectively equal to the angles C and CDB ( 1 ) Hypoth . ( 1 ) , and the side BD , which is ...
... vertex perpendicular to the base , bisects the base and the vertical angle . For in the triangles , ABD , CBD , the angles A and ADB are respectively equal to the angles C and CDB ( 1 ) Hypoth . ( 1 ) , and the side BD , which is ...
Häufige Begriffe und Wortgruppen
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
Beliebte Passagen
Seite 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.
Seite 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.
Seite 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.
Seite 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.
Seite 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.
Seite 2 - A diameter of a circle is a straight line drawn through the centre, and terminated both ways by the circumference.
Seite 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.
Seite 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.
Seite 25 - DE : but equal triangles on the same base and on the same side of it, are between the same parallels ; (i.
Seite 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.