The Elements of Perspective / arranged for the use of schools and intended to be read in connection with the first three books of Euclid

by John Ruskin

[p24]
][PROBLEM V.]

TO DRAW A HORIZONTAL LINE, GIVEN IN POSITION AND MAGNITUDE, BY MEANS OF ITS SIGHT-MAGNITUDE AND DIVIDING-POINTS.

Fig. 16.

Let A B ([Fig. 16.]) be the given line.

Find the position of the point A in

a

.

Find the vanishing-point V, and most convenient dividing-point M, of the line A B.

Join