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SAT Math Practice Exam

Category - Mathematics - Hard

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If diagonal of a square room is d, what is the area of the room?

d/√2
d²/2
d²√2
2d²

Explanation

Answer B - Area of a square = a x a = a² and diagonal d²= a² +a²= 2a²Hence area = d²/2

Key takeaway: In GMAT, word problems based on only basic geometry are asked . You should remember simple formulae of a square. and their application.
Area of square = side x side, Perimeter = 4 x sides ,Diagonal of square = a√2

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