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

geometry  Ms. Sue, Friday, October 15, 2010 at 2:46pm
Pythagorean theorem:
a^2 + b^2 = c^2
9^2 + 19^2 = c^2
81 + 361 = c^2
442 = c^2
21.0238 = c