SOLUTION: You want to mark off a square region in your yard for a patio. You use a tape measure to mark off a quadrialteral on the ground. Each side of the quadrilateral is 2.5 meters long.

Algebra ->  Customizable Word Problem Solvers  -> Geometry -> SOLUTION: You want to mark off a square region in your yard for a patio. You use a tape measure to mark off a quadrialteral on the ground. Each side of the quadrilateral is 2.5 meters long.      Log On

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Question 911772: You want to mark off a square region in your yard for a patio. You use a tape measure to mark off a quadrialteral on the ground. Each side of the quadrilateral is 2.5 meters long. Explain how you can use the tape measure to make sure that the quadrilateral you drew is a square.
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
Measure the diagonals
if the diagonals measures
2.5%5E2 = 2.5^2 =6.25
2%2A%282.5%5E2%29 =12.5
sqrt%282%2A%282.5%5E2%29%29 = 3.5355339059327376220042218105242
then it is a square