Two Triangles Within a Triangle, Cut in Proportion
Lines df and af divide triangle gec proportionally in its sides
A very faint pencil construction of two triangles set inside a larger triangle, its corners lettered g, d, a, e, f, c and b. The note explains that, following from the preceding proposition, the lines df and af cut the triangle gec proportionally along its sides. The figure carries the geometry of the proportional division of a triangle.
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Proportional cutting of triangle gec
Two triangles are inscribed within a triangle whose corners are lettered g, e and c. By the preceding result, the lines df and af cut the triangle gec proportionally in its sides.