Okay I was wondering if anyone could help me out with this one:
Which of these polygons always have reflectional symmetry?
A. Parrallelograms and rectangles
B. Parrallelograms and trapezoids
C. Rectangles and trapezoids
D. None of the above
I am not sure I think it is A but want to know if my answer is wrong or correct.
Parallelograms are allways symmetric about a point (= midpoint of the diagonals) and rectangles are a special form of parallelograms and therefore they are symmetric about a point too. Additionally they are symmetric about the mid-parallels, that means they are symmetric about two different axes.
Originally Posted by Need-Help
Trapezoids generally are not symmetric.
So your answer (A) was correct.