The middle lines of the triangle are referred to as 3: 2: 4, and the perimeter of the triangle is 45cm. Find the sides of the triangle.

1. Let’s say one part in relation to the midlines is x centimeters. Let’s calculate their length.

a) 3x, b) 2x, c) 4x.

2. Let’s make an equation.

3x + 2x + 4x = 45;

9x = 45;

x = 45/9 = 5;

3. Let’s calculate the size of one side.

x * 3 = 5 * 3 = 15 centimeters.

4. Length of the other x * 2 = 5 * 2 = 10 centimeters.

5. Third x * 4 = 5 * 4 = 20 centimeters.

Answer: 15, 10, 20 centimeters.