Question

Длина прямоугольника равна см 8 см.Это на а см больше его ширины.Запиши в виде выражения площадь этого прямоугольгика.

Answer 1

S=8*(8-a)
Выражение для нахождения площади прямоугольника.

Answer 2

площадь этого прямоугольгика равна S= 8*(8-a)

Answer 3

Calculating the Area of a Rectangle

To calculate the area of a rectangle, we can use the formula: Area = Length × Width.

Given that the length of the rectangle is 8 cm and the width is 'a' cm, where 'a' is greater than the width by 'b' cm, we can express the width as 'a - b' cm.

So, the area of the rectangle can be expressed as: Area = 8 × (a - b).

Calculating the Width of the Rectangle

To find the value of 'a' and 'b', we can use the information provided in the search result snippet.

The snippet provides the formula for the perimeter of a rectangle: Perimeter = 2 × (Length + Width).

Using the given information, we can calculate the value of 'a' and 'b' as follows:

- From the snippet, we have the perimeter as 30 cm, which is given by: 30 = 2 × (12 + 3). - Solving for 'a' and 'b': - 12 + 3 = 15 - 2 × 15 = 30

So, the width 'a' is 12 cm and the difference 'b' is 3 cm.

Calculating the Area

Now that we have the values of 'a' and 'b', we can calculate the area of the rectangle using the formula: Area = 8 × (a - b).

Substituting the values, we get: Area = 8 × (12 - 3) = 8 × 9 = 72 square cm.

Therefore, the area of the rectangle is 72 square cm.