As shown in the figure, the perimeter of the right angle △ ABC is 18. There are five small right triangles in it, and the right sides in the same direction are parallel to each other. Find the sum of the perimeter of the five small right triangles

As shown in the figure, the perimeter of the right angle △ ABC is 18. There are five small right triangles in it, and the right sides in the same direction are parallel to each other. Find the sum of the perimeter of the five small right triangles

By using the property of translation, it can be concluded that the sum of the perimeter of the five small triangles is 18