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

In the visual model of \(15^2\) using \((10+5)^2\), what is the area of the small square?

Answer and explanation

Correct answer: 25

The direct answer is B: 25. Write 15 as \(10+5\). In the area model for \((10+5)^2\), the small square is formed by the second part of the side, which has length 5 in both directions. Therefore its area is \(5\times5=5^2=25\). The complete model has a large square of area \(10^2=100\), two rectangles each of area \(10\times5=50\), and the small square of area 25. These add to \(100+50+50+25=225=15^2\). Option A is only the side length 10, not an area. Option B is correct. Option C is the area of one mixed rectangle, not the small square. Option D is the area of the large square. Memory cue: the small corner square uses the second addend on both sides, so its area is the square of that addend.

Related tags

Numeric Area ModelSmall SquareBinomial SquareVisual IdentitiesVisual Models Of IdentitiesExploring Algebraic IdentitiesMathematicsClass 9 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.