The lengths of the sides of the rectangle are directly proportional to the numbers 3,5,6.

The lengths of the sides of the rectangle are directly proportional to the numbers 3,5,6. Find the lengths of the sides of the triangle if its perimeter is 70 cm.

It is known that the lengths of the sides of a triangle are related to each other as numbers 3, 5 and 6.

Therefore, having designated the length of one of the sides of the triangle as “3a” centimeters, the lengths of the other two sides will be equal to “5a” and “6a” centimeters.

Let’s make an equation, considering that the perimeter of the triangle is 70 cm:

3a + 5a + 6a = 70;

14a = 70;

a = 70/14;

a = 5.

We calculate what the lengths of the sides of the triangle are equal to:

5 * 3 = 15 cm, 1 side length;

5 * 5 = 25 cm, 2 sides length;

5 * 6 = 30 cm, length 3 sides.