Question

Периметр квадрата равен 20 см. Найди периметр его пятой части. Реши задачу с помощью чертежа.

Answer 1

...........................

Answer 2

Perimeter of a Square

To find the perimeter of a square, we need to know the length of one side of the square. In this case, the perimeter of the square is given as 20 cm. Let's calculate the perimeter of its fifth part.

Calculation

The perimeter of a square is given by the formula P = 4a, where "P" represents the perimeter and "a" represents the length of one side of the square.

Given that the perimeter of the whole square is 20 cm, we can calculate the length of one side of the square using the formula:

20 = 4a

Dividing both sides of the equation by 4, we get:

a = 20 / 4 = 5 cm

Now, to find the perimeter of the fifth part of the square, we need to divide the length of one side by 5:

Perimeter of the fifth part = (5 cm) / 5 = 1 cm

Therefore, the perimeter of the fifth part of the square is 1 cm.

Diagram

Here is a diagram representing the square:

   A _______ B
    |       |
    |       |
    |_______|
   D         C

In the diagram, A, B, C, and D represent the corners of the square, and the sides AB, BC, CD, and DA are all equal in length.

Summary

- The perimeter of the whole square is 20 cm. - The length of one side of the square is 5 cm. - The perimeter of the fifth part of the square is 1 cm.

I hope this helps! Let me know if you have any further questions.