Question 197777
<font face="Garamond" size="+2">


A quadrilateral is a plane figure that has four sides, that includes squares, rectangles, parallelograms, rhombi (or rhombuses -- your choice), trapezoids, and any other four-sided figure that does not fall into any of the other categories.  A rectangle is a four-sided plane figure that has four right angles for interior angles, whereas a square is a special case of the rectangle where all four sides are congruent.


So, ask yourself:  Can you construct a quadrilateral that is not a square?  Can you construct a rectangle that is not a quadrilateral?  Can you construct a rectangle that is not a square? And finally, can you construct a quadrilateral that is not a rectangle?


I think you mean 'rhombus' as I'm not sure what a 'rhumbus' is.  Three of the statements are always true for a rhombus, but one of them is only true if the rhombus is also a square.  Look up rhombus on Wikipedia.  So, since the question asks for the best statement that is NOT always true...


John
*[tex \LARGE e^{i\pi} + 1 = 0]
</font>