Question

Периметр прямоугольника равен 30 см. Найдите площадь прямоугольника, если длина одной из сторон равна 6 см.

Answer 1

(30-6-6):2=14-длина второй стороны
14х6=84-S

Answer 2

6 см-ширина
30-(6*2)=18 см
18:2=9 см длина
6*9=54 см квадратных

Answer 3

Calculation of the Rectangle's Area

To find the area of a rectangle, we need to know the length of one of its sides. In this case, the length of one side is given as 6 cm, and the perimeter of the rectangle is given as 30 cm.

Let's calculate the area of the rectangle step by step:

1. We know that the perimeter of a rectangle is given by the formula: P = 2 * (a + b), where P is the perimeter, and a and b are the lengths of the sides.

2. In this case, the perimeter is given as 30 cm, so we can write the equation as: 30 = 2 * (a + b).

3. We also know that one side of the rectangle has a length of 6 cm, so we can substitute this value into the equation: 30 = 2 * (6 + b).

4. Simplifying the equation, we get: 30 = 12 + 2b.

5. Subtracting 12 from both sides of the equation, we have: 18 = 2b.

6. Dividing both sides of the equation by 2, we find: b = 9.

7. So, the length of the other side of the rectangle is 9 cm.

8. Now, we can calculate the area of the rectangle using the formula: A = length * width.

9. Substituting the values, we get: A = 6 * 9 = 54 cm^2.

Therefore, the area of the rectangle is 54 square centimeters.

Answer

The area of the rectangle, given that one side has a length of 6 cm and the perimeter is 30 cm, is 54 square centimeters.