Update

Muft Shiksha™ एक 100% Free Education Portal है 🇮🇳, जिसका उद्देश्य Class 9–12 के हर विद्यार्थी तक High-Quality Education को पूरी तरह मुफ्त पहुँचाना है। 🇮🇳 हम मानते हैं कि अच्छी शिक्षा किसी student की आर्थिक स्थिति पर निर्भर नहीं होनी चाहिए। 🇮🇳 हर विद्यार्थी को वही Quality Study Material, MCQs, Quizzes, Exam Preparation, Concept-Based Learning और Bilingual Support मिलना चाहिए, जो आमतौर पर महंगी Coaching या Premium Platforms में मिलता है। Muft Shiksha™ 🇮🇳 इसी सोच के साथ बनाया गया है

Subjects
0 reads0 ratings0 helpful

The hypotenuse of a right triangle is \(17\text{ cm}\), and one leg is \(7\text{ cm}\) longer than the other. What is the length of the shorter leg?

Answer and explanation

Correct answer: \(8\text{ cm}\)

Let the shorter leg be \(x\) cm. Then the longer leg is \((x+7)\) cm. By the Pythagorean theorem, \(x^2+(x+7)^2=17^2\), which simplifies to \(x^2+7x-120=0\). Factoring gives \((x-8)(x+15)=0\). Since a length cannot be negative, \(x=8\) cm. For instance, choosing \(9\) cm would give legs of \(9\) cm and \(16\) cm, which do not produce a hypotenuse of \(17\) cm. Exam tip: In right-triangle word problems, represent the unknown side by \(x\), apply the Pythagorean theorem, and reject any negative length.

Related tags

Quadratic EquationsRight TrianglePythagorean TheoremWord ProblemsAlgebraic EquationsWord Problems And ApplicationsMathematicsClass 10 Mcq

Was this question useful?

No ratings yetWrite a review / Rate this question

Student Reviews

No published reviews yet.

Add Muft Shiksha to your Home Screen

In Safari, tap Share, then Add to Home Screen.