Geometrical drawing, projection drawing, freehand and ornamental drawing, wash work and brush drawing, elementary perspective drawing, architectural drawing (1921)
International Correspondence Schools · Scranton, PA : International Textbook Co. · leaf 48
= PB, and Pis the middlepoint of A B. Since CD is perpendicular to A B, this con-struction also gives a perpendicular to a straight liyie at itstniddle point. Problem 2.—Througti a given point, to draw astraight line parallel to a given straight line. See Exercise I, Sheet I. Construction.—Let P be… … n I LT 53D-4 34 GEOMETRICAL DRAWING ^i arc PE. With D as a. center, and a radius equal to thechord of the arc PB, describe an arc intersecting CD in C.A straight Hne drawn through P and C will be parallelto AB. Problem 3.—To draw^ a perpendicular to a straightline from a given point in ttiat line.…
