Minta tolong dijawab kak.. Makasih

5.
Karena segitiga tersebut sebangun maka
30/10 = 48/ST
3 = 48/ST
ST = 48/3
ST = 16 cm
6.
12/16 = AC/AC + 4
3/4 = AC/AC + 4
AC + 4 = 4/3 AC
AC + 4 = AC + 1/3 AC
4 = 1/3 AC
(maka 4 = 1/3 AC)
AC = 12 cm