Question

Одна зі сторін прямокутника дорівнює 19 см, а периметр – 98 см. Знайди площу прямокутника.

Answer 1

От19+19=38
98-38=60
60:2=30
30•19=570

Answer 2

Finding the Area of a Rectangle

To find the area of a rectangle, we can use the formula: Area = length × width. In this case, we are given the width of the rectangle and its perimeter, so we can use this information to find the length and then calculate the area.

Given Information

- One side of the rectangle = 19 cm - Perimeter of the rectangle = 98 cm

Calculating the Length of the Rectangle

The perimeter of a rectangle is given by the formula: Perimeter = 2 × (length + width). We can use this formula to find the length of the rectangle.

Using the given perimeter (98 cm) and the width (19 cm), we can solve for the length: ``` 98 = 2 × (length + 19) 98 = 2 × length + 38 2 × length = 98 - 38 2 × length = 60 length = 60 / 2 length = 30 ``` So, the length of the rectangle is 30 cm.

Calculating the Area of the Rectangle

Now that we have the length and width of the rectangle, we can use the formula for the area of a rectangle to find the area: ``` Area = length × width Area = 30 cm × 19 cm Area = 570 cm² ``` Therefore, the area of the rectangle is 570 square centimeters.