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The pythagoras theorem states that in a right angled triangle where one angle is of 90 degree , the hypotenuse ( side opposite to 90 degree) is equal to the square root of the sums of the perpendicular (p) and base (b)
H ^{2} =P^{2} +B^{2}
or ,
H= \sqrt{P ^{2}+B^{2}  } .
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