Two equal semicircles divided into equal parts
Subtracting the segments a, b and f between two equal semicircles.
A small figure lettered f a b accompanies a rule of subtraction: take a from b to leave a remainder of b equal to f, then take that remainder from a (1, 2). Two semicircles are declared equal and divided into an equal number of equal parts (3). The rest of the sheet is filled with further segment and crescent figures, together with additional notes not transcribed in this bundle.
On this page
Rule of subtraction among segments f, a, b
Working from the figure f a b, Leonardo instructs: take a from b, and the remainder of b equals f. Then take that remainder of b, equal to the said f, away from a.
Two equal semicircles equally divided
The two semicircles are stated to be equal, and divided into an equal number of equal parts.
Segments and crescents across the sheet
Beyond the lettered figure the page carries numerous small diagrams of circular segments, sectors and crescents drawn with the compass, some filled with hatching. These figures are not covered by the three transcribed captions.