Question

Обчисліть площу прямокутника, периметр якого дорівнює 168 см, якщо одна зі сторін у 2 рази більша за іншу

Answer 1

168:2=84(СМ)-  Довжина і ширина разом
Нехай перша сторона буде х см, тоді друга - 2х см, тоді:
х+2х=84
3х=84
х=84:3
х=28
28 см - перша сторона
2*28=56 (см)- друга сторона
28*56=1568 (см2)- площа прямокутника

Answer 2

168:4=42                                                                                                                42умножить на 2=84                                                                                            84умножить на 42=3528площадь

Answer 3

Calculating the Area and Perimeter of a Rectangle

To calculate the area and perimeter of a rectangle, we can use the following formulas:

1. Perimeter of a Rectangle: - The perimeter (P) of a rectangle is given by the formula: P = 2*(length + width).

2. Area of a Rectangle: - The area (A) of a rectangle is given by the formula: A = length * width.

Given that one side of the rectangle is 2 times larger than the other side, we can represent the sides as follows: Let's assume: - Length = x - Width = 2x (since one side is 2 times larger than the other)

Calculating the Perimeter

The perimeter of the rectangle is given as 168 cm. Using the formula for the perimeter of a rectangle, we can calculate the value of x.

We have: P = 2*(x + 2x) 168 = 2*(x + 2x) 168 = 2*(3x) 168 = 6x

Dividing both sides by 6: x = 168 / 6 x = 28

So, the length (x) is 28 cm, and the width (2x) is 56 cm.

Calculating the Area

Now that we have the values for the length and width, we can calculate the area of the rectangle using the formula for the area of a rectangle.

A = length * width A = 28 * 56 A = 1568

Therefore, the area of the rectangle is 1568 square centimeters.