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tatiyna
3 years ago
5

PLEASEEE

Mathematics
1 answer:
zzz [600]3 years ago
6 0

Answer:

13.4

Step-by-step explanation:

AB =2DC

So, DC=AB/2

Now, AB/AC=DE/DC

AB/28=13/(AB/2)

AB²=13×28×2

AB=√728

AB=26.98

now, DC=AB/2

=13.4

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