Elements of Geometry, Containing the First Six Books of EuclidBaldwin, Cradock, and Joy, 1826 - 180 sider |
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Side 3
... opposite sides and angles equal to one another , but all its sides are not equal , nor its angles right angles . ᄆ 33. All other four sided figures besides these are called trapeziums . 34. Parallel right lines are those which are in ...
... opposite sides and angles equal to one another , but all its sides are not equal , nor its angles right angles . ᄆ 33. All other four sided figures besides these are called trapeziums . 34. Parallel right lines are those which are in ...
Side 7
... opposite to the equal sides . Let there be two triangles , ABC , DEF , which have the two sides ab , ac , equal to the two sides de , df , each to each ; namely , the side AB equal to the side DE , and the side Ac equal to DF ; also the ...
... opposite to the equal sides . Let there be two triangles , ABC , DEF , which have the two sides ab , ac , equal to the two sides de , df , each to each ; namely , the side AB equal to the side DE , and the side Ac equal to DF ; also the ...
Side 8
... opposite . Therefore the angle FBC is equal to the angle GCB ; and the angle BCF to the angle CBG . Wherefore , because the whole angle ABG has been proved to be equal to the FC * This theorem was discovered by Thales , for he is first ...
... opposite . Therefore the angle FBC is equal to the angle GCB ; and the angle BCF to the angle CBG . Wherefore , because the whole angle ABG has been proved to be equal to the FC * This theorem was discovered by Thales , for he is first ...
Side 17
... opposite . Therefore the base AB is equal to the base FC ; and the triangle AEB to the triangle FEC ; also the remaining angles to the remaining angles each to each , to which the equal sides are opposite . Therefore the angle BAE is ...
... opposite . Therefore the base AB is equal to the base FC ; and the triangle AEB to the triangle FEC ; also the remaining angles to the remaining angles each to each , to which the equal sides are opposite . Therefore the angle BAE is ...
Side 18
... opposite angle ABC ; add ACB , which is common . There- fore the angles ACD , ACB , are greater than the angles ABC , ACB . But ACD , ACB , are equal to two right angles , whence ABC , BCA , are less than two right angles . In like ...
... opposite angle ABC ; add ACB , which is common . There- fore the angles ACD , ACB , are greater than the angles ABC , ACB . But ACD , ACB , are equal to two right angles , whence ABC , BCA , are less than two right angles . In like ...
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Elements of Geometry; Containing the First Six Books of Euclid ... Euclid,John Playfair Uten tilgangsbegrensning - 1814 |
Elements of Geometry: Containing the First Six Books of Euclid: With a ... John Playfair Uten tilgangsbegrensning - 1866 |
Elements of Geometry: Containing the First Six Books of Euclid: With a ... John Playfair Uten tilgangsbegrensning - 1855 |
Vanlige uttrykk og setninger
ABC is equal adjacent angles Algebra angle ABC angle ACB angle BAC angles equal base BC bisected centre circle ABC circum circumference BC diameter double draw equal angles equal circles equal right lines equal to F equi equiangular equimultiples Euclid EUCLID'S ELEMENTS exceed exterior angle fore four magnitudes fourth Geometry given circle given point given right line gnomon greater ratio hence inscribed join less Let ABC multiple parallel parallelogram perpendicular polygon proportional Q. E. D. Deduction Q. E. D. PROPOSITION rectangle contained remaining angle right angles right line AB right line AC sector HEF segment side BC similar and similarly square of AC subtending THEOREM tiple touches the circle triangle ABC triangle DEF whence whole
Populære avsnitt
Side xxvi - A diameter of a circle is a straight line drawn through the centre, and terminated both ways by the circumference. XVIII. A semicircle is the figure contained by a diameter and the part of the circumference cut off by the diameter. XIX. "A segment of a circle is the figure contained by a straight line, and the circumference it cuts off.
Side 74 - The straight line drawn at right angles to the diameter of a circle, from the extremity of it, falls without the circle...
Side 33 - The complements of the parallelograms, which are about the diameter of any parallelogram, are equal to one another.
Side 148 - 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 27 - And because the angle ABC is equal to the angle BCD, and the angle CBD to the angle ACB, therefore the whole angle ABD is equal to the whole angle ACD • (ax.
Side 8 - 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.
Side 73 - DH; (I. def. 15.) therefore DH is greater than DG, the less than the greater, which is impossible : therefore no straight line can be drawn from the point A, between AE and the circumference, which does not cut the circle : or, which amounts to the same thing, however great an acute angle a straight line makes with the diameter at the point A, or however small an angle it makes with AE, the circumference must pass between that straight line and the perpendicular AE.
Side 99 - To describe a square about a given circle. Let ABCD be the given circle ; it is required to describe a square about it. . Draw two diameters AC, BD of the circle ABCD, at right angles to one another, and through the points A, B, • 17.3. C, D, draw...
Side 7 - ... equal to them, of the other. Let ABC, DEF be two triangles which have the two sides AB, AC equal to the two sides DE, DF, each to each, viz. AB equal to DE, and AC to DF ; but the base CB greater than the base EF ; the angle BAC is likewise greater than the angle EDF.
Side 88 - From a given circle to cut off a segment, which shall contain an angle equal to a given rectilineal angle.