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### Contents

 BOOK I 9 Axioms 16 BOOK II 38 Problems relating to the First and Second Books 5368 53 BOOK III 69 Measurement of Areas and Proportions of Figures 82_108 109
 BOOK V 116 BOOK VI 126 Appendix 103164 164 MENSURATION OF SURFACES 165 MENSURATION OF THE ROUND BODIES 202

### Popular passages

Page 50 - After remarking that the mathematician positively knows that the sum of the three angles of a triangle is equal to two right angles...
Page 12 - If two triangles have two sides, and the included angle of the one equal to two sides and the included angle of the other, each to each, the two triangles are equal in all respects.
Page 2 - For this purpose it is divided into 360 equal parts called degrees, each degree into 60 equal parts called minutes, and each minute into 60 equal parts called seconds. The degrees, minutes, and seconds are marked thus � ' " ; and 9� 18' 16", are read, 9 degrees 18 minutes and 16 seconds.
Page 60 - BD then A is said to have the same ratio to B, that C has to D ; or, the ratio of A to B is equal to the ratio of C to D.
Page 14 - America, but know that we are alive, that two and two make four, and that the sum of any two sides of a triangle is greater than the third side.
Page 120 - ... cylinder be cut by a plane parallel to the base, the section is a figure parallel and similar to the base. The one point a...
Page 114 - If two triangles have the three sides of the one equal to the three sides of the other, each to each, the triangles are congruent.
Page 164 - To find the area of a trapezoid. RULE. Multiply the sum of the parallel sides by the perpendicular distance between them, and then divide the product by two : the quotient will be the area (Bk.
Page 151 - This pulyedrun may be considered as formed of pyramids, each having for its vertex the centre of the sphere, and for its base one of the faces of the polyedron.
Page 121 - If a cone be cut by a plane parallel to the base, the section will be a circle.