Triangle Inequality Warm Up

You have two boards that will make up the two sides of the triangular sandbox. One is 5 ft and the other is 8 ft. Boards will come in the length 15, 12, 8, 5, and 2. Which boards can you use for the third side of the sandbox? Use the sliders to create the 3rd length. Then try to see if you can form a closed triangular sandbox.