Question

Решите задачу . Периметр прямоугольника 40 см . Одна сторона 4 см . Найдите его площадь .

Answer 1

4+4= 8. 40-8= 32:2=16 16*4 =64

Answer 2

Problem:

We are given the perimeter of a rectangle, which is 40 cm, and one side of the rectangle is 4 cm. We need to find the area of the rectangle.

Solution:

To find the area of a rectangle, we need to know the lengths of both sides. However, we are only given the length of one side, which is 4 cm.

To solve this problem, we can use the formula for the perimeter of a rectangle, which is P = 2 * (a + b), where P is the perimeter, a and b are the lengths of the sides of the rectangle.

Let's assume the length of the given side is 'a' and the length of the other side is 'b'. We can substitute the given values into the formula and solve for 'b'.

Using the formula P = 2 * (a + b), we have: 40 = 2 * (4 + b)

Simplifying the equation, we get: 40 = 8 + 2b

Subtracting 8 from both sides, we have: 32 = 2b

Dividing both sides by 2, we get: b = 16

Now we know that the length of the other side of the rectangle is 16 cm.

To find the area of the rectangle, we can use the formula A = a * b, where A is the area, and a and b are the lengths of the sides of the rectangle.

Substituting the values, we have: A = 4 * 16 A = 64 cm^2

Therefore, the area of the rectangle is 64 square centimeters.

Answer:

The area of the rectangle with a perimeter of 40 cm and one side measuring 4 cm is 64 square centimeters.