Posted by Erin on .
The area of a square is 10 square meter. what is the product of the lengths of the diagonals of the square?

Math 
Reiny,
let each side be x
x^2 = 10
x=√10
diagonal ^2 = √10^2+√10^2 = 20
diagonal = √20
product of its diagonal = √20√20 = 20