Question

Площадь прямоугольника равна 56 см2. Чему равен периметр этого прямоугольника, если одна из сторон равна 8 см?

Answer 1

1). 56:8=7
2). 8+8+7+7=30
Ответ: 30 см периметр прямоугольника

Answer 2

56:8=7
8+8+7+7=30
периметр=30см

Answer 3

Calculation of Perimeter of a Rectangle

To find the perimeter of a rectangle, we need to know the lengths of its sides. In this case, we are given that the area of the rectangle is 56 cm² and one of the sides is 8 cm. We can use this information to calculate the perimeter.

Let's denote the length of the rectangle as l and the width as w.

Calculation Steps:

1. We know that the area of a rectangle is given by the formula: Area = length × width. In this case, the area is given as 56 cm². So we have the equation: 56 = l × w.2. We are also given that one of the sides is 8 cm. Let's assume this side is the length of the rectangle. So we have: l = 8 cm. 3. Substituting the value of l into the equation from step 1, we get: 56 = 8 × w. 4. Solving for w, we divide both sides of the equation by 8: w = 56 / 8 = 7 cm. 5. Now we have the values of both l and w, which are 8 cm and 7 cm respectively. 6. The perimeter of a rectangle is given by the formula: Perimeter = 2 × (length + width). Substituting the values of l and w, we get: Perimeter = 2 × (8 + 7) = 2 × 15 = 30 cm. Therefore, the perimeter of the rectangle is 30 cm.

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