### Фй лЭне пй чсЮуфет -Уэнфбоз ксйфйкЮт

Ден енфпрЯубме ксйфйкЭт уфйт ухнЮиейт фпрпиеуЯет.

### ДзмпцйлЮ брпурЬумбфб

УелЯдб 165 - Any two rectangles are to each other as the products of their bases by their altitudes.
УелЯдб 39 - If two triangles have two sides of one equal respectively to two sides of the other, but the included angle of the first greater than the included angle of the second, then the third side of the first is greater than the third side of the second.
УелЯдб 65 - 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 172 - The areas of two triangles which have an angle of the one equal to an angle of the other are to each other as the products of the sides including the equal angles. To prove that Proof. A Let the triangles ABC and ADE have the common angle A. A ABC -AB X AC Now and A ADE AD X AE Draw BE.
УелЯдб 122 - In any proportion the terms are in proportion by Composition ; that is, the sum of the first two terms is to the first term as the sum of the last two terms is to the third term.
УелЯдб 355 - Similar cylinders are to each other as the cubes of their altitudes, or as the cubes of the diameters of their bases.
УелЯдб 52 - Two triangles are congruent if two sides and the included angle of one are equal respectively to two sides and the included angle of the other.
УелЯдб 140 - If two polygons are composed of the same number of triangles, similar each to each and similarly placed, the polygons are similar.
УелЯдб 123 - In any proportion the terms are in proportion by composition and division ; that is, the sum of the first two terms is to their difference as the sum of the last two terms to their difference.
УелЯдб 207 - 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.