Figure 6. The Greek cubit
(all measures in inches)
1. DE is extended downwards to intersect at V a line from F
which is at right angles to DF.
DFV is a 3.4.5 proportion triangle.
1. DV is 18 11/48 (18.2291666 ...) inches, the Greek cubit, and 5/4 times the measure of
DF, the remen of 14 7/12 inches. A Greek cubit is 1 1/2 Greek feet.