The First Six Books: Together with the Eleventh and Twelfth |
Inni boken
Side 15
Poft , CA , CB to the points A , B ; ABC ball be an equilateral triangle . Because the point A is the centre of the circle BCD , AC is equal to AB ; and because the point B is the centre of the c . 15th Deo circle ACE , BC is equal to ...
Poft , CA , CB to the points A , B ; ABC ball be an equilateral triangle . Because the point A is the centre of the circle BCD , AC is equal to AB ; and because the point B is the centre of the c . 15th Deo circle ACE , BC is equal to ...
Side 17
For , if the triangle ABC be applied 10 DEF , so that the point A may be on D , and the straight line AB upon DE ; the point B shall coincide with the point E , because AB is equal to DE ; and AB coinciding with DE , AC shall coincide ...
For , if the triangle ABC be applied 10 DEF , so that the point A may be on D , and the straight line AB upon DE ; the point B shall coincide with the point E , because AB is equal to DE ; and AB coinciding with DE , AC shall coincide ...
Side 18
G Book I. qual to AC , and let the straight lines AB , AC be produced to D and E , the angle ABC shall be equal to ... I. qualb to the base GB , and the triangle AFC to the triangle AGB ; and the remaining angles of the one are equal b ...
G Book I. qual to AC , and let the straight lines AB , AC be produced to D and E , the angle ABC shall be equal to ... I. qualb to the base GB , and the triangle AFC to the triangle AGB ; and the remaining angles of the one are equal b ...
Side 19
Let ABC be a triangle having the angle ABC equal to the Book 1 . angle ACB ; the fide AB is also equal to the side AC . ... I. qual to AC , the less , and join DC ; therefore , because in the triangles DBC , ACB , A DB is equal to AC ...
Let ABC be a triangle having the angle ABC equal to the Book 1 . angle ACB ; the fide AB is also equal to the side AC . ... I. qual to AC , the less , and join DC ; therefore , because in the triangles DBC , ACB , A DB is equal to AC ...
Side 21
Ax ' tore if two triangles , & c . ... I. qual to AD ; join DE , and upon it defcribe an equilateral triangle DEF ; A bi . ... Describe a upon it an equilateral triangle ABC , and bifect a f . the angle ACB by the straight line CD .
Ax ' tore if two triangles , & c . ... I. qual to AD ; join DE , and upon it defcribe an equilateral triangle DEF ; A bi . ... Describe a upon it an equilateral triangle ABC , and bifect a f . the angle ACB by the straight line CD .
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The First Six Books: Together with the Eleventh and Twelfth Euclid Ingen forhåndsvisning tilgjengelig - 2016 |
Vanlige uttrykk og setninger
added alſo altitude angle ABC angle BAC baſe becauſe Book caſe centre circle circle ABCD circumference common cone cylinder definition demonſtrated deſcribed diameter divided double draw drawn equal equal angles equiangular equimultiples exceſs fame fides figure firſt folid fore four fourth given angle given in poſition given in ſpecies given magnitude given ratio given ſtraight line greater Greek half join leſs likewiſe magnitude manner meet muſt oppoſite parallel parallelogram perpendicular plane priſm produced prop proportionals propoſition pyramid reaſon rectangle rectangle contained rectilineal remaining right angles ſame ſecond ſegment ſhall ſides ſimilar ſolid ſphere ſquare ſquare of AC Take taken theſe third triangle ABC wherefore whole
Populære avsnitt
Side 483 - The circumference of every circle is supposed to be divided into 360 equal parts, called degrees ; and each degree into 60 equal parts, called minutes ; and each minute into 60 equal parts, called seconds ; and these into thirds, &c.
Side 170 - 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 81 - THE straight line drawn at right angles to the diameter of a circle, from the extremity of...
Side 105 - DEF are likewise equal (13. i.) to two right angles ; therefore the angles AKB, AMB are equal to the angles DEG, DEF, of which AKB is equal to DEG ; wherefore the remaining angle AMB is equal to the remaining angle DEF.
Side 167 - AC the same multiple of AD, that AB is of the part which is to be cut off from it : join BC, and draw DE parallel to it : then AE is the part required to be cut off.
Side 10 - When a straight line standing on another straight line makes the adjacent angles equal to one another, each of the angles is called a right angle; and the straight line which stands on the other is called a perpendicular to it.
Side 62 - AB be the given straight line ; it is required to divide it into two parts, so that the rectangle contained by the whole, and one of the parts, shall be equal to the square of the other part.
Side 112 - To describe an equilateral and equiangular pentagon about a given circle. • Let ABCDE be the given circle; it is required to describe an equilateral and equiangular pentagon about the circle ABCDE. Let the angles of a pentagon, inscribed in the circle...
Side 200 - 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. either the sides adjacent to the equal...
Side 38 - F, which is the common vertex of the triangles ; that is, together with four right angles. Therefore all the angles of the figure, together with four right angles, are equal to twice as many right angles as the figure has sides.