### тИ КщМЕ ОИ ВЯчСТЕР -сЩМТАНГ ЙЯИТИЙчР

дЕМ ЕМТОПъСАЛЕ ЙЯИТИЙщР СТИР СУМчХЕИР ТОПОХЕСъЕР.

### пЕЯИЕВЭЛЕМА

 BOOK I 1 Postulates 7 Propositions 68 Definitions 155 Propositions 161
 1 2 190 Definitions 197 Propositions 201 197 289 APPENDICES 305

### дГЛОЖИКч АПОСПэСЛАТА

сЕКъДА 39 - To draw a straight line through a given point parallel to a given straight line. Let A be the given point, and BC the given straight line...
сЕКъДА 52 - To a given straight line to apply a parallelogram, which shall be equal to a given triangle, and have one of its angles equal to a given rectilineal angle.
сЕКъДА 16 - To draw a straight line at right angles to a given straight line, from a given point in the same.
сЕКъДА 5 - From a given point to draw a straight line equal to a given straight line. Let A be the given point, and BC the given straight line ; it is required to draw, from the point A, a straight line equal to BC.
сЕКъДА 11 - Upon the same base, and on the same side of it, there cannot be two triangles that have their sides which are terminated in one extremity of' the base, equal to one another, and likewise those which are terminated in the other extremity.
сЕКъДА 105 - If a straight line touch a circle, and from the point of contact a straight line be drawn cutting the circle ; the angles which this line makes with the line touching the circle, shall be equal to the angles which are in the alternate segments of the circle.
сЕКъДА 118 - IF a straight line touch a circle, and from the point of contact a straight line be drawn at right angles to the touching line, the centre of the circle shall be in that line.
сЕКъДА 66 - If a straight line be divided into two equal parts, and also into two unequal parts; the rectangle contained by the unequal parts, together with the square of the line between the points of section, is equal to the square of half the line.
сЕКъДА 6 - From the greater of two given straight lines to cut off a part equal to the less. Let AB and C be the two given straight lines, whereof AB is the greater.
сЕКъДА 119 - Upon a given straight line to describe a segment of a circle, which shall contain an angle equal to a given rectilineal angle.