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OpenStudy (anonymous):
i need some help please
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OpenStudy (anonymous):
hartnn (hartnn):
do you know pythagoras theorem ?
hartnn (hartnn):
since QRST is rectangle, angle S is 90 degrees so, triangle RST is right triangle. apply the pythagoras theorem in that triangle
OpenStudy (anonymous):
@hartnn could you please xplain?
hartnn (hartnn):
|dw:1391878339852:dw|
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