Question

Периметр прямоугольника равен 36 см. сумма длин его трёх сторон равна 25 см. найди площадь прямоугольника

Answer 1

25*25 =625 или 25 в квадрате

Answer 2

Calculation of Rectangle Area

To find the area of a rectangle, we need to know the length and width of the rectangle. In this case, we are given the perimeter of the rectangle, which is 36 cm, and the sum of its three sides, which is 25 cm.

Let's assume the length of the rectangle is a and the width is b.

The perimeter of a rectangle is given by the formula: P = 2(a + b).

From the given information, we can set up the following equation: a + b + (a + b) = 25.

Simplifying the equation, we get: 2(a + b) = 25.

Now, we can substitute the value of the perimeter, which is 36 cm, into the equation: 2(a + b) = 36.

Simplifying further, we get: a + b = 18.

We have a system of equations: - Equation 1: 2(a + b) = 36 - Equation 2: a + b = 18

Solving this system of equations, we find that a = 9 and b = 9.

Now, we can calculate the area of the rectangle using the formula: A = a * b.

Substituting the values of a and b, we get: A = 9 * 9 = 81 cm^2.

Therefore, the area of the rectangle is 81 square centimeters.