The answer is 12.5, but if you round it, it will most likely be 13, so the answer is C.13, hopes this helps!!:)
Answer:
BC = 35 units
Step-by-step explanation:
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The unknown side lengths are
Large triangle 10
Medium triangle 2
Small triangle 12/5 or 2.4
Step-by-step explanation:
EFD to ABC is 0.4 or 2/5
EFD to GHI is 0.24 or 6/25
ABC to GHI is 0.6 or 6/10
