Euclid's Elements of Geometry: The Six First Books. To which are Added, Elements of Plain and Spherical Trigonometry, a System of Conick Sections, Elements of Natural Philosophy, as Far as it Relates to Astronomy, According to the Newtonian System, and Elements of Astronomy: with Notes |
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Page 14
... extremes of a line , are points . 4. A right line , is that which lieth equally between its points : 5. A superficies , is that which hath length and breadth only . 6. The extremes of a superficies , are lines . 7. A plain superficies ...
... extremes of a line , are points . 4. A right line , is that which lieth equally between its points : 5. A superficies , is that which hath length and breadth only . 6. The extremes of a superficies , are lines . 7. A plain superficies ...
Page 19
... extremes of the given right line [ Post . 1 ] . The triangle ABE , which is constituted on the given right line AB , is equilateral . For AE is equal to AB , being both radiuses of the same cir- cle BEC [ Def . 10 ] ; and BE is equal to ...
... extremes of the given right line [ Post . 1 ] . The triangle ABE , which is constituted on the given right line AB , is equilateral . For AE is equal to AB , being both radiuses of the same cir- cle BEC [ Def . 10 ] ; and BE is equal to ...
Page 20
... extreme of the given right line , to which the right line is drawn from the given point ; and also , according to the part of the right line so drawn , to which the triangle is constituted . PROP . III . PROB . Two unequal right lines ...
... extreme of the given right line , to which the right line is drawn from the given point ; and also , according to the part of the right line so drawn , to which the triangle is constituted . PROP . III . PROB . Two unequal right lines ...
Page 27
... lines stand on the same right line ( CD ) , on the same side of it , and at the same point ( B ) , not being an extreme ; they make angles equal to two right angles , PROP . XIV . THEOR . Two right lines ( BOOK I. 27 OF GEOMETRY .
... lines stand on the same right line ( CD ) , on the same side of it , and at the same point ( B ) , not being an extreme ; they make angles equal to two right angles , PROP . XIV . THEOR . Two right lines ( BOOK I. 27 OF GEOMETRY .
Page 32
... extremes of any side ( BC ) , are to- gether less than the other sides ( AB , AC ) of the triangle , but contain a greater angle ( BDC ) . E Produce BD to meet AC in E , and be- cause the sides BA , AE of the triangle BAE , are greater ...
... extremes of any side ( BC ) , are to- gether less than the other sides ( AB , AC ) of the triangle , but contain a greater angle ( BDC ) . E Produce BD to meet AC in E , and be- cause the sides BA , AE of the triangle BAE , are greater ...
Other editions - View all
Euclid's Elements of Geometry, the First Six Books: To Which Are Added ... John Allen No preview available - 2023 |
Euclid's Elements of Geometry, the First Six Books: To Which Are Added ... John Allen No preview available - 2018 |
Common terms and phrases
angle ACB arch asymptote bisected centre centripetal force circle circumference conical surface conick section described diameter difference directrix distance draw ellipse ellipse or hyperbola equal angles equal Ax equal Cor equal Hyp equiangular Euclid's Elements focus given right line greater half sum inscribed less let fall magnitudes meeting the section opposite hyperbolas opposite sections ordinately applied parabola parallel parallelogram perpendicular plain principal vertex PROB produced PROP proportional proposition quadrant radius rect rectangle right angles right line drawn Scholium secant section or opposite segments semidiameter severally equal shewn sides sine spherical triangle square of CB submultiple tangent THEOR triangle ABC vertex whence
Popular passages
Page 2 - In conformity to the act of Congress of the United States, entitled, " An act for the encouragement of learning, by securing the copies of maps, charts and books, to the authors and proprietors of such copies, during the times therein mentioned ;
Page 2 - Co. of the said district, have deposited in this office the title of a book, the right whereof they claim as proprietors, in the words following, to wit : " Tadeuskund, the Last King of the Lenape. An Historical Tale." In conformity to the Act of the Congress of the United States...
Page 42 - Therefore all the interior angles of the figure, together with four right angles, are equal to twice as many right angles as the figure has sides.
Page 176 - If two triangles have an angle of one equal to an angle of the other...
Page 118 - To describe an isosceles triangle, having each of the angles at the base double of the third angle.
Page 15 - The circumference of every circle is supposed to be divided into 360 equal parts, called degrees ; each degree into 60 equal parts, called minutes ; and each minute into 60 equal parts, called seconds.
Page 444 - Absolute, true, and mathematical time, of itself, and from its own nature, flows equably without relation to anything external, and by another name is called duration: relative, apparent, and common time, is some sensible and external (whether accurate or unequable) measure of duration by the means of motion, which is commonly used instead of true time; such as an hour, a day, a month, a year.
Page 96 - Upon the same straight line, and upon the same side of it, there cannot be two similar segments of circles, not coinciding with one another.
Page 386 - ... figure, together with four right angles, are equal to twice as many right angles as the figure has be divided into as many triangles as the figure has sides, by drawing straight lines from a point F within the figure to each of its angles.
Page 49 - Equal triangles on the same base, and on the same side of it, are between the same parallels.