Question

Периметр квадрата 20см,какова его площадь?

Answer 1

1)5*4=20периметр 2)5*5= 25 площадь

Answer 2

Если периметр равен 20 см, то одна сторона квадрата равна 5 см, отсюда следует,что площадь равна 25 см. кажется так

Answer 3

Perimeter and Area of a Square

To find the area of a square, we need to know its perimeter. In this case, the perimeter of the square is given as 20 cm. We can use this information to calculate the area of the square.

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

Using the given perimeter of 20 cm, we can solve for the length of one side (a):

P = 4a

20 = 4a

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

a = 5 cm

Now that we know the length of one side of the square is 5 cm, we can calculate its area.

The formula for the area of a square is A = a^2, where A represents the area and a represents the length of one side of the square.

Substituting the value of a into the formula, we have:

A = (5 cm)^2

Simplifying the equation, we find:

A = 25 cm^2

Therefore, the area of the square with a perimeter of 20 cm is 25 square centimeters.

Conclusion

The area of a square with a perimeter of 20 cm is 25 square centimeters.