### Фй лЭне пй чсЮуфет -Уэнфбоз ксйфйкЮт

Ден енфпрЯубме ксйфйкЭт уфйт ухнЮиейт фпрпиеуЯет.

### Ресйечьменб

 PRELIMINARY DEFINITIONS 1 Воок 15 Воок 72 Воок 122 Воок 162 Воок 188
 APPENDIX TO PLANE GEOMETRY 211 SYMMETRICAL FIGURES 217 SOLID GEOMETRY 233 POLYEDRONS 273 SPHERE 360 РнехмбфйкЬ дйкбйюмбфб

### ДзмпцйлЮ брпурЬумбфб

УелЯдб 58 - The straight line joining the middle points of two sides of a triangle is parallel to the third side, and equal to half of it.
УелЯдб 322 - A right circular cylinder may be generated by the revolution of a rectangle about one of its sides as an axis.
УелЯдб 371 - A zone is a portion of the surface of a sphere included between two parallel planes.
УелЯдб 49 - ... the three sides of one are equal, respectively, to the three sides of the other. 2. Two right triangles are congruent if...
УелЯдб 336 - A spherical polygon is a portion of the surface of a sphere bounded by three or more arcs of great circles. The...
УелЯдб 151 - If one leg of a right triangle is double the other, the perpendicular from the vertex of the right angle to the hypotenuse divides it into segments which are to each other as 1 to 4.
УелЯдб 328 - A sphere is a solid bounded by a surface all points of which are equally distant from a point within called the centre.
УелЯдб 205 - S' denote the areas of two © whose radii are R and R', and diameters D and D', respectively. Then, | = "* § = ЈЈ = Ј• <§337> That is, the areas of two circles are to each other as the squares of their radii, or as the squares of their diameters.
УелЯдб 73 - A chord is a straight line joining the extremities of an arc ; as AB.
УелЯдб 202 - The circumferences of two circles are to each other as their radii. Given C and C" the circumferences of two © whose radii are R and R', respectively.