You have wood donated from Home Depot to build a booth to sell the shirts and hats from, but you need to provide dimensions for the panels. They are 4 feet high and come in a variety of lengths. The space you have to build your triangular stand is 5 ft by 12 ft rectangle in the corner of the commons. You want a triangle so there is room for people to stand to order. How big do the board pieces (4feet high) need to be (you need a front and 2 sides). How do you figure out this problem?
To figure the third side, use Pythagorean theorem.
5^2 + 12^2 = h^2
This gives you the perimeter of the triangle.
However, since they come in a "variety of lengths", you need more information. Also how high is the stand? What about the opening to sell the products?