Tolong dijawab please Ini pelajaran kelas 2 smp Tolong beserta caranya :D

Nomor 4
R = 7 cm
r = 2 cm
p = 13 cm
[tex]l = \sqrt{ {13}^{2} - {(7 - 2)}^{2} } \\ l = \sqrt{169 - 25} \\ l = \sqrt{144 } \\ l = 12 \: cm[/tex]
Nomor 5
R = 9 cm
r = 4 cm
p = 9 + 4 = 13 cm
[tex]l = \sqrt{ {13}^{2} - {(9 - 4)}^{2} } \\ l = \sqrt{169 - 25} \\ l = \sqrt{144} \\ l = 12 \: cm[/tex]