The perimeter of an isosceles triangle is 3.2 m, the base is 1 m less than the lateral side. Find the sides of the triangle.

1. A, B, C – the vertices of the triangle.

2. According to the condition of the problem, the base is 1 m less than the lateral side. AC = BC – 1 m.

3. Further calculations are performed using the formula for calculating the perimeter:

BC + AB + AC = 3.2 m.

BC = AB, since the triangle is isosceles.

4. Substitute in the original expression BC instead of AB and (BC – 1) instead of AC:

ВС – 1 + 2ВS = 3.2 m.

3BC = 4.2 m.

BC = 4.2: 3 = 1.4 m.

AC = 1.4 – 1 = 0.4 m.

Answer: BC = AB = 1.4 m, AC = 0.4 m.