Answer:
AC = AB + BC = 14 + 6 = 20
BD = CD + BC = 14 + 6 = 20
Step-by-step explanation:
AB = CD because it was given as true,
BC = BC because of the reflexive postulate,
AB+BC = CD + BC because of the addition postulate.
MANY get very technical and say AB+BC=AC and CD+BC=BD from the partition postulate, and then you can use the substitution postulate to get your final statement AC=BD.
