PLEASE HELP !! WILL GIVE BRAINLIST!!
The foundation of a shed is in the shape of a square with an unknown side length. The diagonal of the square, from one corner of the foundation to the other, is 15ft. Which of the following equations could be used to find the length of a side of the square foundation?
a) x^2=15
b) 2x^2=225
c) x^2=225
d) 2x^2=15