Answer:AB=6 DB=9 CD=6
Explanation:
If AC and CD are congruent, the are both 6 (because half of 12 is 6)
That means, If AB and BC are congruent, they are each 3(because 3 is half of 6
For DB, 3+6=9
AB = 3
DB = 3 + 6 = 9
CD = 6
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