H
E
E
L
E
M
E
N
T
S
let the square CEFB be described on CB, [I.46]
and
let BE be joined;
through D
let DG be drawn parallel to either CE or BF,
through H again
let KM be drawn parallel to either AB or EF,
and again through A
let AK be drawn parallel to either CL or BM. [I.31]
