### тИ КщМЕ ОИ ВЯчСТЕР -сЩМТАНГ ЙЯИТИЙчР

дЕМ ЕМТОПъСАЛЕ ЙЯИТИЙщР СТИР СУМчХЕИР ТОПОХЕСъЕР.

### дГЛОЖИКч АПОСПэСЛАТА

сЕКъДА 40 - 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.
сЕКъДА 126 - To describe an isosceles triangle having each of the angles at the base double of the third angle.
сЕКъДА 136 - The first of four magnitudes is said to have the same ratio to the second which the third has to the fourth, when...
сЕКъДА 207 - Construct a rectangle having the difference of its base and altitude equal to a given line, and its area equivalent to the sum of a given triangle and a given pentagon.
сЕКъДА 202 - In any proportion, the product of the means is equal to the product of the extremes.
сЕКъДА 142 - If a line divides two sides of a triangle proportionally, it is parallel to the third side.
сЕКъДА 175 - Any two rectangles are to each other as the products of their bases by their altitudes.
сЕКъДА 72 - Every point in the bisector of an angle is equally distant from the sides of the angle ; and every point not in the bisector, but within the angle, is unequally distant from the sides of the angle.
сЕКъДА 73 - A CIRCLE is a plane figure bounded by a curved line, all the points of which are equally distant from a point within called the centre; as the figure ADB E.
сЕКъДА 146 - 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. A D A' Hyp. In triangles ABC and A'B'C', To prove AABC A A'B'C' A'B' x A'C ' Proof. Draw the altitudes BD and B'D'.