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OpenStudy (anonymous):
sweetie. it has been so long since I took algebra or geometry. I cannot remember how to calculate it. I know that all triangles = 180 degrees, but this is not talking about the angles. it is talking about the length.
OpenStudy (anonymous):
oh ok
OpenStudy (anonymous):
if my calculations are right. its 27
OpenStudy (anonymous):
because the hypotenuse of that triangle is 42 and 42+21 is 63, and 90-63 is 27.