Diện tích đổi ra mét vuông phải là: 0,0072.
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A rectangle has a perimeter of 3.6dm and one side is twice as long as another. What is the rectangle’s area in m2?
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A square of side 8cm has the same perimeter as a rectangle. If the ratio of the width of the rectangle to its length is 1:3 then its area is ....?
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