Question

Найди периметр квадрата со стороной 28 см . найди периметр прямоугольника длиной 86 см и шириной 43 см .вырази полученные ответы в виде м, дм, см. помогите пожалуйста срочно

Answer 1

Рквадрата=4*а=4*28=112 см=1,12м=11,2дм
Рпрямоуг=2*(а+в)=2*(43+86)=258см=2,58м=25,8дм

Answer 2

Perimeter of a Square

To find the perimeter of a square with a side length of 28 cm, we can use the formula:

Perimeter = 4 * side length

Substituting the given side length of 28 cm into the formula, we get:

Perimeter = 4 * 28 cm = 112 cm.

Therefore, the perimeter of the square is 112 cm.

Perimeter of a Rectangle

To find the perimeter of a rectangle with a length of 86 cm and a width of 43 cm, we can use the formula:

Perimeter = 2 * (length + width)

Substituting the given length of 86 cm and width of 43 cm into the formula, we get:

Perimeter = 2 * (86 cm + 43 cm) = 2 * 129 cm = 258 cm.

Therefore, the perimeter of the rectangle is 258 cm.

Expressing the Answers in Different Units

To express the obtained answers in different units, we can convert centimeters (cm) to meters (m) and decimeters (dm).

- Converting cm to m: 1 m = 100 cm, so to convert cm to m, we divide by 100. - Converting cm to dm: 1 dm = 10 cm, so to convert cm to dm, we divide by 10.

Converting the perimeter of the square (112 cm) to meters and decimeters:

- Perimeter in meters: 112 cm / 100 = 1.12 m - Perimeter in decimeters: 112 cm / 10 = 11.2 dm

Converting the perimeter of the rectangle (258 cm) to meters and decimeters:

- Perimeter in meters: 258 cm / 100 = 2.58 m - Perimeter in decimeters: 258 cm / 10 = 25.8 dm

Therefore, the perimeter of the square can be expressed as 1.12 m or 11.2 dm, and the perimeter of the rectangle can be expressed as 2.58 m or 25.8 dm.

I hope this helps! Let me know if you have any further questions.