Equal Division of a Rectangle: a Equals b
Red-chalk proportion studies, with the note 'a will be equal to b'
In red chalk, the page carries geometric studies on the division of rectangles. One rectangle has its right side broken by circular indentations and is lettered b, c, a, with the note that a will be equal to b. Another rectangle is divided into five similar rectangles set between two parallel lines. A faint cylindrical form banded by horizontal lines is drawn near the top of the sheet.
On this page
Rectangle with circular indentations, lettered b, c, a
A rectangle whose right side is broken by circular indentations is marked with the letters b, c, a. The accompanying note declares that a will be equal to b, a statement of equality between the divided parts.
Rectangle divided into five similar rectangles
A rectangle is divided into five similar rectangles held between two parallel lines. It belongs to the notebook's recurring concern with dividing figures into equal or proportional parts.