The following conditional statement is true.
All of the sides of a quadrilateral are congruent if it is arhombus.
Which of the following statements must also be true?
a) If not all of the sides of a quadrilateral are congruent,then it is not a rhombus.
b) If a quadrilateral is not a rhombus, then all of its sidesare not congruent.
c) If a quadrilateral is a rhombus, then not all of its sidesare congruent.
d) If all of the sides of a quadrilateral are congruent, then itis a rhombus.
e) None of the above
