The answer is 4.5 for the side length of the pentagon and 7.5 is the side length for the triangle because 7.5 3(3 sides) = 22.5 and 4.5 5(5 sides)= 22.5. The perimeter is 22.5
The side of the triangle is 7.5 inches, and the perimeter of the triangle is 22.5 inches. ;
The side length of the equilateral triangle is 7.5 inches, which gives it a perimeter of 22.5 inches. This is derived from the fact that the perimeter of both the equilateral triangle and the regular pentagon are equal, with the sides of the pentagon being 3 inches shorter. Therefore, the triangle's perimeter is calculated as 22.5 inches.
;