You can put this solution on YOUR website! Hypotenuse of isosceles right triangle = 15 feet
..
let leg be x
x^2+x^2=15^2
2x^2=225
divide by 2
x^2= 225/2
x= sqrt(225/2)
..
Area of triangle = 1/2 * leg1*leg2
=1/2 *sqrt(225/2)*sqrt(225/2)
=1/2 * 225/2
= 225/2
=112.5 sq.feet