### Фй лЭне пй чсЮуфет -Уэнфбоз ксйфйкЮт

Ден енфпрЯубме ксйфйкЭт уфйт ухнЮиейт фпрпиеуЯет.

### Ресйечьменб

 INTRODUCTION 9 Triangles 18 Quadrilaterals 26 Of Polygons in General 35 Problems in Construction 49 BOOK II 55 Of Circles 68
 BOOK III 76 Of Parallelopipeds 79 The Prism and the Cylinder 83 Pyramids and Cones 86 The Sphere 92 SUPPLEMENT Sec XVIII Miscellaneous Examples 97 Applications of Algebra 99

### ДзмпцйлЮ брпурЬумбфб

УелЯдб 69 - If from a point without a circle, a tangent and a secant be drawn, the tangent will be a mean proportional between the secant and its external segment.
УелЯдб 42 - The circumference of every circle is supposed to' be divided into 360 equal parts, called degrees ; each degree into 60 minutes, and each minute into 60 seconds. Degrees, minutes, and seconds are designated by the characters °, ', ". Thus 23° 14' 35" is read 23 degrees, 14 minutes, and 35 seconds.
УелЯдб 21 - 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.
УелЯдб 47 - It follows, then, that the area of a circle is equal to half the product of its circumference and its radius.
УелЯдб 72 - The areas of two circles are to each other as the squares of their radii. For, if S and S' denote the areas, and R and R
УелЯдб 33 - The square described on the hypothenuse of a right-angled triangle is equivalent to the sum of the squares described on the other two sides.
УелЯдб 38 - The area of a regular polygon is equal to half the product of its apothem and perimeter.
УелЯдб 52 - PROBLEM VII. Two angles of a triangle being given, to find the third angle. The three angles of every triangle are together equal to two right angles (Prop.
УелЯдб 30 - The area of a rectangle is equal to the product of its base and altitude.
УелЯдб 69 - 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...