Lucinda wants to build a square sandbox, but she has no way of measuring angles. explain how she can make sure that the sandbox is square by only measuring length.
a. arrange four equal-length sides so the diagonals bisect each other.
b. arrange four equal-length sides so the diagonals are equal lengths also.
c. make each diagonal the same length as four equal-length sides.
d. not possible; lucinda has to be able to measure a right angle.
explain your answer -