Question

От квадрата с периметром 20 см отрезали(по всей длине) прямоугольник шириной 1 см. Найдите периметр большего прямоугольника Пожалуйста решите по действиям!

Answer 1

20/4=5(сторона квадрата)
5-1=4(сторона больного прямоугольника)
2*(5+4)=18(периметр большого треугольника)

Answer 2

Problem Analysis

We are given a square with a perimeter of 20 cm. A rectangle with a width of 1 cm is cut from the square. We need to find the perimeter of the larger rectangle.

Solution

To find the perimeter of the larger rectangle, we need to determine the dimensions of the rectangle. Let's assume the side length of the square is 's' cm.

The perimeter of the square is given as 20 cm. Since a square has all sides equal, we can express the perimeter as 4s = 20 cm. Solving this equation, we find that s = 5 cm.

Now, we know the side length of the square is 5 cm. A rectangle with a width of 1 cm is cut from the square. The length of the rectangle will be the remaining side of the square after the cut.

To find the length of the rectangle, we subtract twice the width (1 cm) from the side length of the square: Length of the rectangle = side length of the square - 2 * width of the rectangle = 5 cm - 2 cm = 3 cm

Now we have the dimensions of the larger rectangle: width = 1 cm and length = 3 cm. To find the perimeter of the rectangle, we use the formula: Perimeter = 2 * (length + width)

Substituting the values, we get: Perimeter = 2 * (3 cm + 1 cm) = 2 * 4 cm = 8 cm

Therefore, the perimeter of the larger rectangle is 8 cm.

Answer

The perimeter of the larger rectangle is 8 cm.