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In the visual area model, what type of parts are a², 2ab, and b²?

Answer and explanation

Correct answer: Area parts

Direct answer: B, area parts. In a visual model for (a+b)², the large square is divided into four regions: one square of side a and area a², two rectangles with sides a and b and total area ab+ab=2ab, and one square of side b and area b². Thus every term represents an area, not merely a length, angle, or perimeter. A is wrong because a², ab, and b² are products of lengths and describe regions, although a and b themselves may be lengths. C is wrong because no angle is represented by these algebraic terms. D is wrong because perimeter measures boundary length, whereas these terms add to the total area. Memory cue: in an area model, multiply the two side lengths of each tile; the resulting products are area terms.

Related tags

Area-ModelAlgebraic-IdentitiesVisual-MeaningVisual Models Of IdentitiesExploring Algebraic IdentitiesMathematicsClass 9 Mcq

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