Réponse:
[tex] \frac{ae}{ag} = \frac{af}{ah} = \frac{ef }{gh} \\ \frac{5}{15} = \frac{4}{gh} \\ gh = \frac{15 \times 4}{5} = 12[/tex]
[tex] \frac{sk}{sm} = \frac{sj}{sl} = \frac{jk}{lm} \\ \frac{sk}{5} = \frac{4}{10} \\ sk = \frac{4 \times 5}{10} = 2[/tex]
