Question

ширина прямоугольника 8 см,что 4 см меньше его длины.Найти периметр и площать этого прямоугольника.

Answer 1

1) 8 + 4 = 12 см - длина

2)12 * 8 = 96 см - площадь 

3) (12 + 8 ) * 2 = 40 см

ответ: площадь прямоугольника 96 см в квадрате а периметр 40 см

Answer 2

1)8+4=12(см) - длина
2) (8+12)х2=28(см)-периметр
3) 8x12=96(см в квадрате)-площадь

Answer 3

I can help you with your math problem.

The user's message is in Russian and it means: "Answer in detail. The width of a rectangle is 8 cm, which is 4 cm less than its length. Find the perimeter and area of this rectangle."

To solve this problem, we need to find the length of the rectangle first. Since the width is 4 cm less than the length, we can write an equation:

width = length - 4

Substituting the given value of the width, we get:

8 = length - 4

Adding 4 to both sides, we get:

12 = length

So, the length of the rectangle is 12 cm.

Now, we can find the perimeter and area of the rectangle using the formulas:

perimeter = 2 * (length + width)

area = length * width

Substituting the values of the length and width, we get:

perimeter = 2 * (12 + 8) = 40 cm

area = 12 * 8 = 96 cm^2

Therefore, the perimeter of the rectangle is 40 cm and the area is 96 cm^2.

You can also check your answer using this [online calculator](https://ru.onlinemschool.com/math/formula/rectangle/).

I hope this helps. If you have any other questions, feel free to ask me.