panjang ad=12cm panjang ef= 16cm panjang df=6cm panjang fc=9cm Panjang BC=....cm A. 20 B. 22 C. 24 D. 28

BC = x

[tex] \frac{6}{9} = \frac{16}{x} \\ 6 \times x = 9 \times 16 \\ 6x = 144 \\ x = 144 \div6 \\ x = 24[/tex]

BC = 24 (C)