Dari gambar di bawah,Hitunglah panjang EF!

EF = [tex] \displaystyle \frac{(AB \times FC) + (DC \times FB)}{BC} [/tex]

EF = [tex] \displaystyle \frac{(8 \times 6) + (18 \times 4)}{10} [/tex]

EF = [tex] \displaystyle \frac{48 + 72}{10} [/tex]

EF = [tex] \displaystyle \frac{120}{10} [/tex]

EF = 12