What is the perimeter of a 3-inch and 5-inch rectangle?

It is known that a rectangle has four sides, so to find the perimeter (P) of a rectangle, you need to add the lengths of all its sides. It is also known that the sides of a rectangle are parallel and equal. Find the perimeter (P) of the rectangle.
3 + 5 + 3 + 5 = 16 (dm).
Answer: the perimeter of the rectangle (P) = 16 dm.

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