Question

Периметр прямоугольника равен 32 а одна из сторон 9 см.найти вторую сторону и площадь

Answer 1

32=9*2+2*х
32-18=2х
14=2х
х=7
вторая сторона 7
9*7 =63

Answer 2

Perimeter of a Rectangle

To find the second side and the area of a rectangle given that the perimeter is 32 cm and one side is 9 cm, we can use the formula for the perimeter of a rectangle:

Perimeter = 2 * (Length + Width)

Let's calculate the second side and the area step by step.

1. Given information: - Perimeter = 32 cm - One side = 9 cm

2. Finding the second side: - Let's assume the second side is represented by 'b'. - Using the perimeter formula, we have: 32 = 2 * (9 + b) - Simplifying the equation: 32 = 18 + 2b - Subtracting 18 from both sides: 14 = 2b - Dividing both sides by 2: b = 7 cm

3. Finding the area: - The area of a rectangle is given by the formula: Area = Length * Width - Substituting the given values: Area = 9 cm * 7 cm - Calculating the area: Area = 63 cm²

Therefore, the second side of the rectangle is 7 cm, and the area of the rectangle is 63 cm².