Question

Which statement is logically equivalent to the following conditional statement?

If it has five sides, then it is not an octagon.
Answer
If it does not have five sides, then it is an octagon.
If it is not an octagon, then it has five sides.
If it is an octagon, then it does not have five sides.
If it does not have five sides, then it is not an octagon.

Answer 1

contrP is logically equivalent

Answer 2

if p then q = if -q then -p

if my english is up to speed; that looks to be the third option

Answer 3

I also think it is the third one :D

Answer 4

discrete math was fun; but oy! then english stuff we had to suffer thru ....

Answer 5

haha i love English but geometry not so much :P