Since a rectangle has two pairs of equal sides. Then we can find the two lengths of the rectangle and then calculate the length and area of the rectangle.
1) 28 – (5 * 2) = 28 – 10 = 18 (cm) two lengths of a rectangle;
2) 18: 2 = 9 (cm) one rectangle length;
3) 9 * 5 = 45 (cm ^ 2) area of the rectangle.
Answer: 9 cm is the length of the rectangle, 45 cm ^ 2 is the area of the rectangle.
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.