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The hypotenuse of a right triangle is 17 units, and one leg is 7 units longer than the other. What is the length of the shorter leg?

Answer and explanation

Correct answer: 8

Let the shorter leg be \(x\) units. Then the longer leg is \(x+7\) units. By the Pythagorean theorem, \(x^2+(x+7)^2=17^2\), which simplifies to \(x^2+7x-120=0\). Factoring gives \((x+15)(x-8)=0\), so \(x=8\), since a length cannot be negative. Therefore, the correct answer is 8. The value 15 is the longer leg, not the shorter one; 8-15-17 is a Pythagorean triple.

Related tags

Quadratic-EquationsWord-ProblemsRight-TrianglePithagorean-TheoremClass-10-MathematicsWord Problems And ApplicationsQuadratic EquationsMathematics

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