In a rectangle, one side is 9 centimeters long and the diagonal is 15 centimeters. find the second side.
| September 2, 2021 | education
Since all angles in a rectangle are right, its adjacent sides and the diagonal form a right-angled triangle, in which the sides are legs, the diagonal is the hypotenuse.
By the Pythagorean theorem, the square of the unknown side of a rectangle can be found as the difference between the squares of the diagonal and the known side: a ^ 2 = 152 – 92 = 225 – 81 = 144.
The second side of the rectangle is √144 = 12 cm.
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.
