Question

Прямоугольник и квадрат имеют один и тот же периметр. сторона квадрата 14 см. ширина прямоугольника 7 см. найди его длину. ПЛИИЗ . ВТОРОЙ КЛАСС ЕЩЕ НЕ УМНОЖАЮТ!

Answer 1

14+14+14+14=56
56-7-7=42
42:2=21
Длина прямоугольника 21

Answer 2

Perimeter of a Rectangle and Square

To find the length of the rectangle, we need to know the perimeter of both the rectangle and the square. The perimeter of a rectangle is calculated by adding the lengths of all its sides. Similarly, the perimeter of a square is calculated by adding the lengths of all its sides.

Given that the side of the square is 14 cm and the width of the rectangle is 7 cm, we can calculate the perimeter of the square and the rectangle.

Perimeter of the Square

The perimeter of a square is calculated by multiplying the length of one side by 4. In this case, the side of the square is 14 cm, so the perimeter of the square is 14 cm * 4 = 56 cm.

Perimeter of the Rectangle

The perimeter of a rectangle is calculated by adding the lengths of all its sides. In this case, the width of the rectangle is 7 cm. Since opposite sides of a rectangle are equal in length, the length of the rectangle is also 7 cm. Therefore, the perimeter of the rectangle is (7 cm + 7 cm + 7 cm + 7 cm) = 28 cm.

Since the perimeter of the square and the rectangle is the same, we can equate their perimeters:

56 cm = 28 cm + length of the rectangle

To find the length of the rectangle, we can subtract the width of the rectangle from the perimeter of the square:

length of the rectangle = 56 cm - 28 cm = 28 cm.

Therefore, the length of the rectangle is 28 cm.

Please note that it's important to verify this information with your teacher or a trusted adult, as they can provide guidance and ensure accuracy.