Panjang BC adalah: a.4 cm b.8 cm c.10 cm d.12 cm

[tex] \frac{7,5}{12} = \frac{5}{x} \\ \\ \frac{3}{12} = \frac{2}{x} \\ \\ \frac{1}{4} = \frac{2}{x} \\ \\ x = 8[/tex]

Jadi panjang BC = 8 cm (B)