Question

Найти двумя способами площадь прямоугольника АВСД. Две стороны по 5 см, две другие по 2 см.

Answer 1

Первый вариант 5x5+2x2 ,второй вариант( 5+2)x2

Answer 2

Calculating the Area of Rectangle ABCD

To find the area of rectangle ABCD, we can use two different methods:

Method 1: Using the formula A = length * width

In this case, the length of the rectangle is 5 cm and the width is 2 cm. By substituting these values into the formula, we can calculate the area as follows:

A = length * width A = 5 cm * 2 cm A = 10 cm^2

Therefore, the area of rectangle ABCD is 10 square centimeters.

Method 2: Using the perimeter and one side length

Another way to find the area of a rectangle is by using the perimeter and the length of one side. The formula for the area of a rectangle in terms of the perimeter and one side length is:

A = (perimeter/2) * (side length - (perimeter/4))

In this case, the perimeter of the rectangle is 2 * (5 cm + 2 cm) = 14 cm. By substituting this value into the formula, we can calculate the area as follows:

A = (14 cm / 2) * (2 cm - (14 cm / 4)) A = 7 cm * (2 cm - 3.5 cm) A = 7 cm * (-1.5 cm) A = -10.5 cm^2

However, since the area of a rectangle cannot be negative, we can conclude that there was an error in the calculation. Therefore, we should disregard this result.

Based on the calculations from Method 1, we can confidently say that the area of rectangle ABCD is 10 square centimeters.

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