Lucinda wants to build a square sandbox, but she has no way of measuring angles. Which of the following explains how she can make sure the sandbox is square by measuring only length?
-Arrange four equal-length sides so the diagonals bisect each other.
-Arrange four equal-length sides so the diagonals are equal lengths also.
-Make each diagonal the same length as four equal-length sides.
-Not possible; Lucinda has to be able to measure a right angle.

Question

Lucinda wants to build a square sandbox, but she has no way of measuring angles. Which of the following explains how she can make sure the sandbox is square by measuring only length?  
-Arrange four equal-length sides so the diagonals bisect each other.
-Arrange four equal-length sides so the diagonals are equal lengths also.
-Make each diagonal the same length as four equal-length sides.
-Not possible; Lucinda has to be able to measure a right angle.

mertsj · Answer

The second one