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A visual model of an area difference is made by removing a square of side 5 units from a square of side 12 units. What is the remaining area?

Answer and explanation

Correct answer: 119 square units

The correct answer is A, 119 square units. The area of a square is found by multiplying its side by itself, or using side². The large square has area 12² = 144 square units. The removed small square has area 5² = 25 square units. Because the question asks for the area left after removal, subtract the smaller area from the larger area: 144 − 25 = 119 square units. Option A is correct because it represents the remaining region. Option B is only the area of the original large square, before anything is removed. Option C is only the area of the removed square. Option D is 13² and does not describe either square or their difference. Memory cue: area difference means large square area minus small square area.

Related tags

Area DifferenceVisual ModelAlgebraic IdentitiesSquaresVisual Models Of IdentitiesExploring Algebraic IdentitiesMathematicsClass 9 Mcq

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