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

Fig. 23.

Fig. 24.

Find the sight-magnitudes of A B and A E. Draw the two sides

a b

,

a c

, of the square of the base, by [Problem VIII.], as in [Fig. 24.] From the points

a

,