Question

Twenty nine is the shortest leg of a right triangle whose other leg and hypotenuse are consecutive whole numbers. What is the sum of the lengths of the other two sides

Answers

  1. The sum of the lengths of the other two sides of a right triangle will be 841.
    We have,
    The shortest leg of a right triangle = 29,
    And,
    According to the question,
    The other leg and hypotenuse of a right triangle are consecutive whole numbers,
    i.e.
    Let,
    Other leg = x,
    And,
    Hypotenuse = x+1,
    So,
    Now,
    Using Pythagoras Theorem,
    (Hypotenuse)² = (Perpendicular)² + (Base)²
    i.e.
    H² = P² + B²
    So,
    Now Putting values,
    i.e.
    (x+1)² = x² + 29²
    So,
    On Solving we get,
    x² + 1 + 2x = x² + 841
    x² + 2x – x² = 841 – 1
    We get,
    2x = 840
    So,
    x = 420
    I.e.
    Other leg = 420,
    So,
    Hypotenuse = x+1 = 420 + 1 = 421,
    Now,
    The sum of the lengths of the other two sides of right triangle,
    i.e.
    Hypotenuse + Other leg = 420 + 421 = 841
    Hence we can say that the sum of the lengths of the other two sides of a right triangle will be 841.
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