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In the area model of a square with side \(6+2\), how can the total area be written?

Answer and explanation

Correct answer: \(36+24+4\)

Direct answer: option B, \(36+24+4\). A square with side \(6+2\) has area \((6+2)^2\). Divide the side into lengths 6 and 2. The area model then contains a \(6\) by \(6\) square with area \(36"); two rectangles, each \(6\) by \(2\), with total area \(12+12=24\); and a \(2\) by \(2\) square with area 4. Adding all non-overlapping parts gives \(36+24+4=64\). This is the numerical form of \((a+b)^2=a^2+2ab+b^2\). Option A omits the two middle rectangles. Option C adds lengths or partial products incorrectly and is not the complete area. Option D happens to equal 60, not the actual area 64, and it does not represent the partition. Memory cue: for \((6+2)^2\), remember square, two rectangles, square: \(36+24+4\).

Related tags

Numeric Area ModelSquare IdentityVisual AlgebraBinomial SquareVisual Models Of IdentitiesExploring Algebraic IdentitiesMathematicsClass 9 Mcq

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