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In a rectangle with sides (x+2) and (x+6), what will be the area of the small corner?

Answer and explanation

Correct answer: 12

The correct answer is B: 12. In a visual area model, split one side into lengths x and 2, and the other side into lengths x and 6. This creates four smaller rectangles. The small corner formed by the two numerical pieces has side lengths 2 and 6. Therefore, its area is length × breadth = 2 × 6 = 12. Option A, 8, is not the product of the two corner lengths; it is only their sum. Option B is correct because it uses both dimensions of the small corner. Option C, 2x, is the area of the rectangle whose sides are 2 and x. Option D, 6x, is the area of the rectangle whose sides are 6 and x. Thus, the complete expansion is (x+2)(x+6)=x²+8x+12. Memory cue: in an area model, multiply the two side labels surrounding the particular region you are asked about.

Related tags

Algebraic IdentitiesVisual ModelsRectangle AreaBinomial MultiplicationVisual Models Of IdentitiesExploring Algebraic IdentitiesMathematicsClass 9 Mcq

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