The perimeter of the hip triangle is 28 cm, and the lateral side is 10 cm. Find the base of the triangle.

An isosceles triangle is a triangle in which the two sides are equal in length. Equal sides are called lateral, and not an equal side is called the base.

Given:
a = 10 cm;

b = 10 cm;

c =? cm ;
P = 28 cm.

Let’s take for x – the base of the triangle:

10 +10 + x = 28;
x = 28 – 20;
x = 8.
Answer: 8 cm. At the base of the triangle.