Look at the statement below.

“All squares are quadrilateral.”

Which of these is a logically equivalent statement?

A. If it is not a square, it is not a quadrilateral.

B. All quadrilaterals are squares.

C. If it is not a quadrilateral, it is not a square.

D. It will be a quadrilateral if and only if it is square.

Question

Look at the statement below.
 
“All squares are quadrilateral.”
 
Which of these is a logically equivalent statement? 

A. If it is not a square, it is not a quadrilateral.

B. All quadrilaterals are squares.

C. If it is not a quadrilateral, it is not a square.

D. It will be a quadrilateral if and only if it is square.

aripotta · Answer

http://en.wikipedia.org/wiki/Logical_equivalence so i'm guessing it's c

anonymous · Answer

I figured it was that one. Thanks @AriPotta

anonymous · Answer

yea it is

anonymous · Answer

c