Question

Ширина прямоугольника 3 см длина в 4 больше Найдите периметр прямоугольника Найдите площадь прямоугольника

Answer 1

1) 3*4=12(см)
P*=3+12+3+12=30(см)
S*=3*12=36(см2)
P - периметр
S - площадь

Answer 2

 3 см длина в 4 больше  длины это значит
длина равняется 12 см
а P=2(a+b)=2(3+12)=30 см это пириметр
а S=a*b=12*3=36см^2 это площадь

Answer 3

Calculation of Perimeter and Area of a Rectangle

To find the perimeter and area of a rectangle, we need to know the width and length of the rectangle. In this case, the width of the rectangle is 3 cm and the length is 4 cm more than the width.

Perimeter of a Rectangle

The perimeter of a rectangle is calculated by adding the lengths of all four sides. For a rectangle with width (w) and length (l), the formula for the perimeter (P) is:

P = 2(w + l)

Using the given values, we can calculate the perimeter of the rectangle:

P = 2(3 + (3 + 4))

Simplifying the equation:

P = 2(3 + 7) = 2(10) = 20 cm.

Therefore, the perimeter of the rectangle is 20 cm.

Area of a Rectangle

The area of a rectangle is calculated by multiplying the width and length of the rectangle. For a rectangle with width (w) and length (l), the formula for the area (A) is:

A = w * l

Using the given values, we can calculate the area of the rectangle:

A = 3 * (3 + 4)

Simplifying the equation:

A = 3 * 7 = 21 cm^2.

Therefore, the area of the rectangle is 21 square centimeters.

To summarize: - The perimeter of the rectangle is 20 cm. - The area of the rectangle is 21 cm^2.