Answer: 212.5 square feet
Step-by-step explanation:
If we were to complete the square, the total area of the square would be [tex]15^2=225[/tex] square feet.
The area of the triangle added to 'complete the square' is [tex]\frac{1}{2}(15-10)(15-10)=12.5[/tex] square feet.
So, the area of the floor is [tex]225-12.5=212.5[/tex] square feet.
