Question

What is the contrapositive of the statement “If a quadrilateral has four congruent sides, then it is a rhombus”?

Answer 1

p->q <=> ~q->~p
p=a quad has 4 congruent sides
q= the quad is a rhombus

p->q = if a quad has 4 congruent sides, then the quad is a rhombus.

~p(negation of p) = a quad does NOT have 4 congruent sides
~q (negation of q) = the quad is NOT a rhombus.
so ~q->~p is ....

Answer 2

If a quadrilateral is not a rhombus, then it does not have four congruent sides.