The midline of an isosceles triangle, parallel to the base, is 4cm, and its perimeter is 28cm. Find the side of the triangle.

You are given an isosceles triangle ABC with base AC; AB = BC;

The middle line DE is equal to half of the base AC, which means that the base

AC = 2 * DE = 2 * 4 = 8 cm;

The perimeter of the triangle is AB + BC + AC = 28; AB + BC = 28 – 8 = 20;

Since AB = BC, the side is 20/2 = 10 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.