csaluja wrote:

Could anyone please explain why statement 2 is insufficient? Isn't there a property that says A rectangle can be a square as well?

hi

you can see Bunuel the great has already replied to your confusion, however, for some elementary clarification, remember that

rectangle means, 4 right angles

square means, 4 right angles + all sides are equal

now, hope this is clear that all squares possess all the characteristics of rectangles, but

rectangles do not possess all the characteristics of squares

thanks, and cheers with kudos if this is clear to you!