Question 751141: find the perimeter and area of a square with diagonal length of 18 meters. give answer in simplest radical. Answer by FrankM(1040) (Show Source):
You can put this solution on YOUR website! If the diagonal of the square is given, we use a^2+b^2=c^2 to get one side.
(But a=b for a square, so it's simply 2a^2)
2a^2=18^2
2a^2=324
a^2= 162 (Note - 162 = 81*2)
a= 9sqr(2) this is one side.
The area is a^2 or 162sq meters.
The perimeter is 4*9sqr(2) or 36sqr(2)
