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posted by tia on Friday, October 15, 2010 at 2:38pm.
AB is 9cm and AC is 19cm calculate the lenght of BC if the angle is a 90 degress
Pythagorean theorem: a^2 + b^2 = c^2 9^2 + 19^2 = c^2 81 + 361 = c^2 442 = c^2 21.0238 = c
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