Question

Длина прямоугольника 19см,а ширина на 9см больше.найди Р и S прямоугольника.

Answer 1

Given Information

The length of the rectangle is 19 cm, and the width is 9 cm more than the length.

Calculation of Perimeter (P)

The perimeter of a rectangle is calculated by adding the lengths of all four sides.

To find the perimeter of the rectangle, we need to add the lengths of the two sides and the widths of the two sides.

Let's calculate the perimeter (P) of the rectangle:

Step 1: Calculate the width of the rectangle. The width is given as 9 cm more than the length, so we can calculate it by adding 9 cm to the length: Width = Length + 9 cm

Step 2: Calculate the perimeter. The perimeter is calculated by adding the lengths of all four sides: P = 2 * (Length + Width)

Substituting the values: P = 2 * (Length + (Length + 9 cm)) P = 2 * (2 * Length + 9 cm) P = 4 * Length + 18 cm

Now, let's substitute the given length value into the equation and calculate the perimeter (P) of the rectangle.

Substituting the given length value: P = 4 * 19 cm + 18 cm P = 76 cm + 18 cm P = 94 cm

Therefore, the perimeter (P) of the rectangle is 94 cm.

Calculation of Area (S)

The area of a rectangle is calculated by multiplying the length and width of the rectangle.

To find the area of the rectangle, we need to multiply the length and width.

Let's calculate the area (S) of the rectangle:

Step 1: Calculate the width of the rectangle. The width is given as 9 cm more than the length, so we can calculate it by adding 9 cm to the length: Width = Length + 9 cm

Step 2: Calculate the area. The area is calculated by multiplying the length and width: S = Length * Width

Substituting the values: S = Length * (Length + 9 cm) S = Length^2 + 9 cm * Length

Now, let's substitute the given length value into the equation and calculate the area (S) of the rectangle.

Substituting the given length value: S = 19 cm * (19 cm + 9 cm) S = 19 cm * 28 cm S = 532 cm^2

Therefore, the area (S) of the rectangle is 532 cm^2.

Summary

- The perimeter (P) of the rectangle is 94 cm. - The area (S) of the rectangle is 532 cm^2.

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