Parallelograms side by side between two parallels
'I have 4 quantities — base and surface'; g c triple of b c
Parallelograms are set side by side between two parallel lines and lettered (K L a d r; g h b c e m) as first through fourth. Leonardo opens with a memorandum — 'I have 4 quantities, that is base and surface' — and concludes that g c is the third multiple of b c. The page extends the notebook's comparison of the bases and areas of figures.
On this page
'I have 4 quantities: base and surface'
Leonardo notes that he is working with four quantities, namely base and surface (area), framing the comparison of the parallelograms below.
Parallelograms side by side between two parallels
Parallelograms placed side by side between two parallel lines are lettered K L a d r and g h b c e m and ranked first through fourth. Leonardo states that g c is the third multiple of b c.