The First Six Books: Together with the Eleventh and Twelfth |
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Page 198
A cylinder is a solid figure described by the revolution of a right angled parallelogram about one of its fides which remains fixed . XXII .
A cylinder is a solid figure described by the revolution of a right angled parallelogram about one of its fides which remains fixed . XXII .
Page 269
Q. E. D. PRO P. X. THE O R. E VERY cone is the third part of a cylinder which has the fame base , and is of an equal altitude with it .
Q. E. D. PRO P. X. THE O R. E VERY cone is the third part of a cylinder which has the fame base , and is of an equal altitude with it .
Page 270
Upon the square ABCD erect a prism of the fame altitude with the cylinder ; this prism is greater than half of the cylinder because if a square be described ...
Upon the square ABCD erect a prism of the fame altitude with the cylinder ; this prism is greater than half of the cylinder because if a square be described ...
Page 271
Nor can the cylinder be less than the triple of the cone . Let it be less , if · possible : Therefore , inversely , the cone is greater than the third part ...
Nor can the cylinder be less than the triple of the cone . Let it be less , if · possible : Therefore , inversely , the cone is greater than the third part ...
Page 272
But this pyramid is the third part of the prism upon the same base AEBFCGDH , and B of the fame altitude with the cylinder . Therefore this prism is greatF ...
But this pyramid is the third part of the prism upon the same base AEBFCGDH , and B of the fame altitude with the cylinder . Therefore this prism is greatF ...
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added alſo altitude angle ABC angle BAC baſe becauſe Book caſe centre circle circle ABCD circumference common compounded cone cylinder definition demonſtrated deſcribed diameter divided double draw drawn equal equal angles equiangular equimultiples exceſs fame fides 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 priſms produced prop proportionals propoſition pyramid reaſon rectangle rectangle contained remaining right angles ſame ſecond ſegment ſhall ſides ſimilar ſolid ſphere ſquare ſquare of AC Take taken theſe third triangle ABC wherefore whole
Popular passages
Page 462 - 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.
Page 160 - 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.
Page 81 - THE straight line drawn at right angles to the diameter of a circle, from the extremity of...
Page 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.
Page 157 - 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.
Page 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.
Page 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.
Page 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...
Page 190 - 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...
Page 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.