mohon bantuannya......

Diketahui :
- DE = 10 cm
- CD = 6 cm
- AD = 3 cm
- AC = 6 cm + 3 cm = 9 cm
- BE = 5 cm

Ditanya : AB = .....?

Penyelesaian :
- AB :

[tex] \: \frac{cd}{ac} = \frac{de}{ab} \\ \: \: \: \frac{6}{9} = \frac{10}{ab} \\ 6ab = 9 \times 10 \\ 6ab = 90 \\ \: \: ab = \frac{90}{6} \\ \: \: ab = 15 \: cm[/tex]

Jawaban : D. 15 cm

Maaf Kalau Salah