« ForrigeFortsett »
(CORRESPONDING TO EUCLID, BOOKS I-VI.)
PREPARED BY THE
ASSOCIATION FOR THE IMPROVEMENT OF GEOMETRICAL
FOURTH EDITION, REVISED.
MACMILLAN AND CO.
[All Rights reserved.]
1832. e. 1.
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.
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 ;