The Extant Greek Works of Apollonius of Perga, Vol. I

III, 21:

Six geometric figures arranged in two rows of three, numbered 1 to 6.
1. A square with vertices labeled α, ζ at the top and ξ, α at the bottom.
2. A triangle with top vertices β, ζ and a bottom vertex υ.
3. A rectangle with top vertices β, ζ and a bottom-right vertex δ.
4. A rectangle with top vertices υ, o and a bottom-right vertex η.
5. A trapezoid with vertices o, ρ at the top and κ, τ at the bottom.
6. A rectangle with top vertices κ, o and a bottom-right vertex ω.

Vc omit it. In fig. 1, for the lower α, Vvc have δ; in fig. 2, Vvc omit β, Vv omit ζ, c has it; in fig. 3, V omits δ; in fig. 4, v has ϑ instead of o; in fig. 5, c has o, v has ϑ, V omits it; V omits ρ, c has τ, Vv omit it; in fig. 6, v omits ω, and for κ, o it has β, ϑ. Illustrated on p. 362, 11 sq.

αζ² : βζυ : βζ × ζδ = νο × οη : κορτ : κο × οω.

III, 54:

Geometric diagrams for proposition III, 54, arranged in two horizontal groups.
Top group: Four vertical line segments labeled υ-γ, μ-α, λ-γ, and κ-α. To their right is rectangle 1 (with labels α, υ at top-left, γ at top-right, μ at bottom-left) and square 2 (vertices μ, α, α, μ).
Bottom group: Four vertical line segments labeled μ-α, μ-α, κ-α, and κ-α. To their right is rectangle 3 (with labels λ, κ at top-left, η, α at top-right, and γ at bottom-left) and square 4 (vertices κ, α, α, κ).

Codex c omits these; in the first line κα, V omits κ, v has it; in fig. 2, V omits α, μ on the right sides, v has them; fig. 3 is omitted by V, v omits α, and for γ has α. The demonstration