Question

Длина прямоугольника 7м а ширина 3,9.Чему оавны площадь и периметр этого прямоугольника?Чему они будут равны если длина увеличиться на 2,2 м,а ширина на 4,1?

Answer 1

Ответ:

Пошаговое объяснение:

Рпрямоуг = 2(7 + 3,9) = 2 • 10,9 = 21,8 м

Sпрямоуг = 7 • 3,9 = 27,3 м2

длина = 7 + 2,2 = 9,2 м

ширина = 3,9 + 4,1 = 8 м

Р = 2(9,2 + 8) = 2 • 17,2 = 34,4 м

S = 9,2 • 8 = 73,6 м2

Answer 2

Calculation of Area and Perimeter of a Rectangle

To calculate the area and perimeter of a rectangle, we need to know its length and width.

Given: - Length of the rectangle = 7m - Width of the rectangle = 3.9m

We can calculate the area and perimeter using the following formulas:

1. Area of a rectangle = length * width 2. Perimeter of a rectangle = 2 * (length + width)

Let's calculate the area and perimeter of the given rectangle:

1. Area: - Length = 7m - Width = 3.9m - Area = 7m * 3.9m = 27.3 square meters

2. Perimeter: - Length = 7m - Width = 3.9m - Perimeter = 2 * (7m + 3.9m) = 2 * 10.9m = 21.8 meters

Therefore, the area of the rectangle is 27.3 square meters and the perimeter is 21.8 meters.

Now, let's consider the scenario where the length is increased by 2.2m and the width is increased by 4.1m:

Given: - Increased length = 7m + 2.2m = 9.2m - Increased width = 3.9m + 4.1m = 8m

We can calculate the new area and perimeter using the same formulas:

1. Area: - Length = 9.2m - Width = 8m - Area = 9.2m * 8m = 73.6 square meters

2. Perimeter: - Length = 9.2m - Width = 8m - Perimeter = 2 * (9.2m + 8m) = 2 * 17.2m = 34.4 meters

Therefore, if the length is increased by 2.2m and the width is increased by 4.1m, the new area of the rectangle will be 73.6 square meters and the new perimeter will be 34.4 meters.

Please let me know if there's anything else I can help you with!