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>> No.11312211 [View]
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11312211

can someone please explain how I can find the length of the new BE (in red)?
I was going to use the law of cosines to find the distance between B and the B and the distance between E and the new E and add/subtract them from the original BE but I can't figure out the distances A -> new B and F -> new E in order to use the law of cosines
please help

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