You would just need to make an inequality from the description. You would make "x" the number. The answer would be "x-4>-1"
66 square inches
Area of rectangle plus area of triangle
1. 24
2. 56
3. 15
4. 60
Hopefully this helps!
If the shape of the room is a square, then the square root of the sum of the squares of the the two adjacent sides will give the diagonal.
i.e.

Since the square root of the sum of the squares of the the two adjacent sides is 24.04 and not 18.79, therefore, the shape of the room is not a square.