No. 8,9 bagaimana cara kerja

9) [tex] \frac{x}{8} = \frac{3}{6} [/tex]
    2x = 8
      x = 8/2 = 4cm
8) [tex] \frac{AE}{12}= \frac{4}{6} [/tex]
    3AE = 12 X 2
     AE  = 24/3 = 8 cm

    panjang AC = AE + EC = 8 + 12 = 20

nomer 8 = D
nomer 9 = C