The perimeter of the rectangle below is 17.6 meters. write an equation that shows how to find the perimeter using the given lengths. then identify the length and width of the rectangle?

The formula of the perimeter of a rectangle is equal to:
Perimeter = 2L + 2W

Forming the equation.
Perimeter = 2L + 2W
17.6 = 2L + 2W

Getting the lengths.
17.6 = 2L + 2W
2L = 17.6 - 2W
L = (17.6 - 2W) / 2

17.6 = 2L + 2W
2W = 17.6 - 2L
W = (17.6 - 2L) / 2

One unique triangle, because those angles add up to 180, and that's how many degrees there are in one triangle.