jika panjang AE : ED = 3 : 2,maka panjang CD=... A. 4 cm B. 5 cm C. 6 cm D. 7 cm pakai cara nya:)

[tex] \frac{17-11}{11-DC} = \frac{3}{2} \\ \frac{6}{11-DC} = \frac{3}{2} [/tex]
kali silang

6 x 2 = (11-DC) 3
12 = 33 - 3DC
3DC = 33 - 12
        = 21
DC = 21/3 = 7