H
E
E
L
E
M
E
N
T
S
let the square CEFD be described on CD, [I.46]
and
let DE be joined;
through the point B
let BG be drawn parallel to either CE or DF,
through the point H
let KM be drawn parallel to either AB or EF,
and further through A
let AK be drawn parallel to either CL or DM. [I.31]
