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The hypotenuse of a right triangle is 185 cm, and one leg is 37 cm longer than the other leg. What is the length of the shorter leg?

Answer and explanation

Correct answer: 111 cm

Let the shorter leg be \(x\) cm. Then the longer leg is \(x+37\) cm. By the Pythagorean theorem, \(x^2+(x+37)^2=185^2\), which simplifies to \(x^2+37x-16428=0\). Factoring gives \((x-111)(x+148)=0\). Therefore, \(x=111\) cm, since a length cannot be negative; \(x=-148\) is rejected. Exam tip: represent the longer side as \(x+\) the given difference before applying the Pythagorean theorem.

Related tags

Quadratic EquationsRight TrianglePythagorean TheoremWord ProblemsAlgebraic EquationsWord Problems And ApplicationsMathematicsClass 10 Mcq

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