The picture shows a barn door: A barn door has two parallel bars. A support AB runs across the diagonal between the two parallel bars. The angle made by the diagonal with the parallel bar on top is 45 degrees. The distance between the two parallel bars is 7 feet. What is the length of the support AB?

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The picture shows a barn door: A barn door has two parallel bars. A support AB runs across the diagonal between the two parallel bars. The angle made by the diagonal with the parallel bar on top is 45 degrees. The distance between the two parallel bars is 7 feet. What is the length of the support AB?

Mathematics
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At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

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help ?
I do you have a diagram???
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Other answers:

okay give me a sec let me see the problem!!!
ok thank you
tan(angle) = opp/adj tan(45) = x/4 4*tan(45) = x x = 4*tan(45) So choice D
there is no 4

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