Question

Одна сторона прямоугольника равна 2см,она составляет 1/2 от длины другой.Найди периметр и площадь прямоугольника.Нужно с краткой записью…Пожалуйста

Answer 1

Ответ:

12 см - периметр прямоугольника , 8 см² - площадь прямоугольника

Пошаговое объяснение:

1) 2*2=4 (см) - вторая сторона  или можно 1) 2: 1/2 = 2*2=4 (см)

2) (2+4)*2=6*2=12 (см) - периметр прямоугольника

3) 2*4=8 (см²) - площадь прямоугольника

Answer 2

Ответ:

P=12

S=8см

Пошаговое объяснение:

1)2*2=4см

2)P=(2+4)*2=112см

3)2*4=88см^2

Answer 3

Problem Analysis

We are given that one side of a rectangle is 2 cm and it is half the length of the other side. We need to find the perimeter and area of the rectangle.

Solution

Let's assume the length of the rectangle is L cm. According to the given information, one side of the rectangle is 2 cm and it is half the length of the other side. Therefore, the width of the rectangle is L/2 cm.

Perimeter of the Rectangle

The perimeter of a rectangle is given by the formula: P = 2(L + W), where P is the perimeter, L is the length, and W is the width of the rectangle.

Substituting the values, we have: P = 2(L + L/2) = 2(3L/2) = 3L cm.

Therefore, the perimeter of the rectangle is 3L cm.

Area of the Rectangle

The area of a rectangle is given by the formula: A = L * W, where A is the area, L is the length, and W is the width of the rectangle.

Substituting the values, we have: A = L * (L/2) = L^2/2 cm^2.

Therefore, the area of the rectangle is L^2/2 cm^2.

Calculation

To find the perimeter and area of the rectangle, we need to determine the value of L.

From the given information, we know that one side of the rectangle is 2 cm and it is half the length of the other side. Therefore, we can write the equation: 2 = L/2.

Solving this equation, we find: L = 4 cm.

Final Answer

Using the value of L = 4 cm, we can calculate the perimeter and area of the rectangle.

- Perimeter: P = 3L = 3 * 4 = 12 cm. - Area: A = L^2/2 = 4^2/2 = 8 cm^2.

Therefore, the perimeter of the rectangle is 12 cm and the area is 8 cm^2.

Note: The sources provided did not contain relevant information for solving this specific problem.