Folio 1v: Triangle on an Equivalent Rectangle, with Sums
Red-chalk area figure and columns of numbers, one written upside-down
The verso continues the arithmetical working of the previous leaf, with columns of multiplied figures in red chalk. Accompanying them the transcription notes a red-chalk figure of a triangle superimposed on an equivalent rectangle, an area-equivalence construction, together with further indeterminate lines beneath the numbers. A tall rectangle with a diagonal and additional untranscribed marginal numerals are visibly present on the sheet.
On this page
Triangle superimposed on an equivalent rectangle
The page bears a red-chalk figure in which a triangle is set over a rectangle of equal area, an area-equivalence construction. Beneath the numbers further indeterminate lines are noted.
Columns of multiplication and sums
Columns of figures are worked around the figure, including a multiplication yielding a large product, with one group of numbers written upside-down. They read as trial calculations rather than continuous prose.