{
    "hints":  [
                  {
                      "text":  "Count the grid squares to find the base and height of each triangle.",
                      "level":  1
                  },
                  {
                      "text":  "Use Area = 1/2 x base x height for each triangle.",
                      "level":  2
                  },
                  {
                      "text":  "Subtract the smallest area from the largest: the difference is 3 cm^2.",
                      "level":  3
                  }
              ]
}