The perimeter of a triangle is 39 cm, the length of its two sides is 10 cm and 12 cm, find the length of the third side.
| June 25, 2021 | education
The perimeter of a triangle is the sum of the lengths of all three of its sides.
In order to find one of the sides of a triangle, knowing its perimeter and the lengths of its two other sides, you need to subtract the sum of the lengths of these known sides from the perimeter.
39 – (10 + 12) = 39 – 22 = 17 (cm).
Answer: The length of the third side is 17 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.
