Question

Найти периметр, если известно что.... а)одна сторона прямоугольника равна 8 дм 6 см, а другая сторона на 5 см больше. б)длина прямоугольника равна 15 см 4мм а ширина в 2 раза меньше. в)сторона квадрата равна 3м27см. г)ширина стола равна 1м20см а длина в 2 раза больше. д)длина прямо-ка участка земли равна 2км 400м.а ширина на 560м меньше...помогите 4 класс

Answer 1

А= 8 дм, 6 см., в=-? , на 5 см больше.
а=86 см
в= 86см+5см= 91 см
Р= (а+в)*2
Р= (86+91)*2 =354 см = 3м 5 дм 4 см

Answer 2

Perimeter of a Rectangle

To find the perimeter of a rectangle, we need to know the lengths of its sides. Let's calculate the perimeters for each given scenario:

a) One side of the rectangle is 8 dm 6 cm, and the other side is 5 cm longer.

To find the perimeter, we can use the formula: P = 2(a + b), where P is the perimeter, a is the length of one side, and b is the length of the other side.

Given: - Side a = 8 dm 6 cm - Side b = a + 5 cm

Using the formula, we can calculate the perimeter: P = 2(8 dm 6 cm + (8 dm 6 cm + 5 cm))

b) The length of the rectangle is 15 cm 4 mm, and the width is 2 times smaller.

Given: - Length = 15 cm 4 mm - Width = Length / 2

Using the formula, we can calculate the perimeter: P = 2(15 cm 4 mm + (15 cm 4 mm / 2))

c) The side of the square is 3 m 27 cm.

Given: - Side of the square = 3 m 27 cm

Using the formula, we can calculate the perimeter: P = 4(3 m 27 cm)

d) The width of the table is 1 m 20 cm, and the length is 2 times longer.

Given: - Width = 1 m 20 cm - Length = 2 * Width

Using the formula, we can calculate the perimeter: P = 2(1 m 20 cm + (2 * 1 m 20 cm))

e) The length of a rectangular piece of land is 2 km 400 m, and the width is 560 m smaller.

Given: - Length = 2 km 400 m - Width = Length - 560 m

Using the formula, we can calculate the perimeter: P = 2(2 km 400 m + (2 km 400 m - 560 m))

Let's calculate the perimeters for each scenario.