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What is the length of BC?

In triangle ABC, angle A is a right angle, and angle B= 45 degrees. (also AC is 12 ft). What is the length of BC? If your answer is not an interger, leave it in simplest racical form.
 
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Kenneth S. | Algebra/Trig/Precalculus/Calculus Instructor Can Be Your TutorAlgebra/Trig/Precalculus/Calculus Instru...
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Isosceles right triangle has hypotenuse (BC in this case) = AC times the square root of two.