The following pictures show n pentagons packed inside a unit pentagon, so that the total sum of the sides of the small pentagons is as large as possible.
1.-2.
3.
4.
Σ s = 1
Trivial.
Σ s = 1.38672+
Found by Jonathan Viquerat
in July 2026.
Σ s = 1.70075+
Found by Jonathan Viquerat
in July 2026.
5.
6.
7.
Σ s = 1.93875+
Found by Jonathan Viquerat
in July 2026.
Σ s = 9–3√5 = 2.29179+
Found by Jonathan Viquerat
in July 2026.
Σ s = 2.42629+
Found by Jonathan Viquerat
in July 2026.
8.
9.
10.
Σ s = 2.56572+
Found by Jonathan Viquerat
in July 2026.
Σ s = 2.70998+
Found by Jonathan Viquerat
in July 2026.
Σ s = 2.85147+
Found by Pedro Martins
in October 2026.
11.
12.
13.
Σ s = 3
Found by Jonathan Viquerat
in July 2026.
Σ s = 3.14733+
Found by Jonathan Viquerat
in July 2026.
Σ s = 3.30108+
Found by Jonathan Viquerat
in July 2026.
14.
15.
16.
Σ s = 3.45203+
Found by Jonathan Viquerat
in July 2026.
Σ s = 3.59224+
Found by Jonathan Viquerat
in July 2026.
Σ s = 3.72987+
Found by Jonathan Viquerat
in July 2026.
17.
18.
19.
Σ s = 3.82787+
Found by Joost de Winter
in October 2026.
Σ s = 3.94005+
Found by Jonathan Viquerat
in October 2026.
Σ s = 4.03601+
Found by Pedro Martins
in July 2026.
20.
21.
22.
Σ s = 4.13423+
Found by Jonathan Viquerat
in October 2026.
Σ s = 4.23476+
Found by Joost de Winter
in October 2026.
Σ s = 4.33704+
Found by Pedro Martins
in October 2026.
23.
24.
25.
Σ s = 4.44311+
Found by Pedro Martins
in October 2026.
Σ s = 4.54060+
Found by Pedro Martins
in October 2026.
Σ s = 4.64729+
Found by Pedro Martins
in October 2026.
26.
27.
28.
Σ s = 4.74665+
Found by Pedro Martins
in October 2026.
Σ s = 4.84886+
Found by Pedro Martins
in October 2026.
Σ s = 4.94920+
Found by Pedro Martins
in October 2026.
29.
30.
31.
Σ s = 5.04424+
Found by Pedro Martins
in October 2026.
Σ s = 5.12855+
Found by Joost de Winter
in October 2026.
Σ s = 5.21299+
Found by Pedro Martins
in October 2026.
32.
33.
34.
Σ s = 5.28858+
Found by Pedro Martins
in October 2026.
Σ s = 5.36511+
Found by Pedro Martins
in October 2026.
Σ s = 5.44057+
Found by Pedro Martins
in October 2026.
35.
36.
37.
Σ s = 5.52511+
Found by Pedro Martins
in October 2026.
Σ s = 5.60148+
Found by Pedro Martins
in October 2026.
Σ s = 5.67730+
Found by Pedro Martins
in October 2026.
38.
39.
40.
Σ s = 5.74943+
Found by Pedro Martins
in October 2026.
Σ s = 5.82688+
Found by Pedro Martins
in October 2026.
Σ s = 5.90709+
Found by Pedro Martins
in October 2026.
41.
42.
43.
Σ s = 5.98566+
Found by Pedro Martins
in October 2026.
Σ s = 6.06142+
Found by Pedro Martins
in October 2026.
Σ s = 6.14198+
Found by Pedro Martins
in October 2026.
44.
45.
46.
Σ s = 6.21317+
Found by Pedro Martins
in October 2026.
Σ s = 6.29403+
Found by Pedro Martins
in October 2026.
Σ s = 6.36504+
Found by Pedro Martins
in October 2026.
47.
48.
49.
Σ s = 6.43540+
Found by Pedro Martins
in October 2026.
Σ s = 6.50530+
Found by Pedro Martins
in October 2026.
Σ s = 6.56935+
Found by Pedro Martins
in October 2026.
50.
Σ s = 6.63069+
Found by Pedro Martins
in October 2026.