S = 3
st + 3t = 6
st = 6 - 3t
s = (6 - 3t)/t = 6/t - 3
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P=s r t , so, s= P/(st)
RT = 6 All you have to do is 15-9.
11
If triangle RST equals triangle MNO then RT = MO = 11 units. All the rest of the question - the lengths of RS and ST are irrelevant.
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