7. the wall is 12 the ladder is 15 find the ground this will make a right angle from the wall and the ground a^2+b^2=c^2 12^2+b^2=15^2 144+b^2=225 -144 both sides b^2=81 square root both sides b=9 ft
8. area of square is s^2 s^2=81 square root both sides s=9cm diagonal= a^2+b^2=c^2 9^2+9^2=c^2 81+81=c^2 162=c^2 square root both sides 12.73cm is diagonal
