Thread: Shapes

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.

Originally Posted by Need-Help

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.

Trapezoids generally are not symmetric.

So your answer (A) was correct.