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

The midline of a triangle is half the side to which it is parallel. If the ratio of the middle lines of the triangle is 2: 2: 4, then the aspect ratio is also 2: 2: 4.

The perimeter is 45 cm – this is 8 parts, one part 45: 8 = 5.625 (cm),

sides of the triangle: a = b = 5.625 * 2 = 11.25 (cm);

c = 5.625 * 4 = 22.5 cm);