IlCreatore wrote:

Just found the original source of the question there was a typo in the statement "which is 9 kilometers west of D".

Fixed

Thanks. Often these questions are difficult to figure out as they are written, they are not clear. Thank you so much for the fixing.

Back to the question

Attachment:

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BE 9, AE= 16, and DE= 12. Finally, DA= 20, because right triangle AED is a 3-4-5 triangle in which each side is multiplied by 4. If you don't realize that, use the Pythagorean theorem to get DA \((DA)^2 = (AE)^2 + (DE)^2 = 256 + 144 = 400\)

DA = 20.

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