Polygons and triangles compared by side and area
Segments 16, 12, 8, 6 above; a column of polygons set against a column of triangles
A very faint pencil sheet continuing the study of proportional figures. Across the top run four segments marked 16 and 12 over 8 and 6, and the lower half places a left-hand column of polygons (16, 8, 64) beside a right-hand column of triangles (12, 6, 36). Each shape is paired with the square of its measure, comparing the figures by area. The page carries the old number 21 and much of the drawing is faint show-through.
On this page
Polygons set against triangles
The lower half opposes a left column of polygons to a right column of triangles. The polygons are marked 16 and 8, the triangles 12 and 6, comparing corresponding figures of the two kinds.
Areas as squares of the sides (64, 36)
Beside the figures stand the numbers 64 and 36, the squares of 8 and 6, tying each shape's linear measure to its area. The four segments above, 16, 12, 8 and 6, set the proportions used.