Question

Задания. 1. Оцените периметр и площадь прямоугольника со сторонами a см и b см, где 21,8 срочно пжпжпжпж​

Answer 1

Ответ:

по пириметор50,а площедь56

Пошаговое объяснение:

Answer 2

Calculating Perimeter and Area of a Rectangle

To calculate the perimeter and area of a rectangle with sides of length *a* cm and *b* cm, where *a* = 21 and *b* = 8, we can use the following formulas:

1. Perimeter (P): The perimeter of a rectangle is the sum of all its sides. For a rectangle, the perimeter is given by the formula: \[ P = 2a + 2b \]

2. Area (A): The area of a rectangle is given by the formula: \[ A = a \times b \]

Calculations

Using the given values: - *a* = 21 cm - *b* = 8 cm

1. Perimeter: \[ P = 2 \times 21 + 2 \times 8 \] \[ P = 42 + 16 \] \[ P = 58 \]

Therefore, the perimeter of the rectangle is 58 cm.

2. Area: \[ A = 21 \times 8 \] \[ A = 168 \]

Therefore, the area of the rectangle is 168 square cm.

So, the perimeter of the rectangle is 58 cm and the area is 168 square cm.