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In a square whose side is divided into parts a and b, what is the area of each of the two equal rectangles?

Answer and explanation

Correct answer: ab

Direct answer: Option A, ab, is correct. A square with total side a + b can be divided in both directions into lengths a and b. Each middle rectangle has one side of length a and the other side of length b. Using rectangle area = length × breadth, each area is a × b = ab. The two equal rectangles together contribute 2ab to the full square area, giving (a + b)² = a² + 2ab + b². Option B, a², is the square region formed by the two a-length parts. Option C, b², is the other corner square. Option D is a length, not an area, and does not multiply the two dimensions. A common confusion is to report the sum of the side parts instead of their product. For a rectangle, always multiply the perpendicular side lengths.

Related tags

Visual ModelsRectangle AreaAlgebraic IdentitiesCross RectanglesVisual Models Of IdentitiesExploring Algebraic IdentitiesMathematicsClass 9 Mcq

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