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October 20, 2014

October 20, 2014

Posted by **carson** on Friday, March 14, 2008 at 12:04am.

- geometry -
**drwls**, Friday, March 14, 2008 at 2:33amAB is the hypotenuse, the length of which is sqrt (3^2 + 4^2) = 5 since this is a right triangle. CD is a line from the right angle corner to a point on the hypotenuse. You can gets its length by applying the law of cosines on smaller triangle BCD. You know the lengths of BD and BC and the included angle B cosine (which is 4/5)

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