OF PLANE GEOMETRY. (CORRESPONDING TO EUCLID, BOOKS I-VI.) PREPARED BY THE ASSOCIATION FOR THE IMPROVEMENT OF GEOMETRICAL TEACHING. FOURTH EDITION, REVISED. London: MACMILLAN AND CO. 1883 [All Rights reserved.] 1832. e. 1. SYLLABUS OF GEOMETRICAL CONSTRUCTIONS. THE following constructions are to be made with the Ruler and Compasses only; the Ruler being used for drawing and producing straight lines, the Compasses for describing circles and for the transference of distances. I. 2. The bisection of an angle. The bisection of a straight line. 3. The drawing of a perpendicular at a point in, and from a point outside, a given straight line, and the determination of the projection of a finite line on a given straight line. 4. The construction of an angle equal to a given angle; of an angle equal to the sum of two given angles, &c. 5. The drawing of a line parallel to another under various conditions-and hence the division of lines into aliquot parts, in given ratio, &c. 6. The construction of a triangle, having given (B) two sides and contained angle; (y) two angles and side adjacent ; |