Clare says, "Last class I thought the parallelogram would have reflection symmetry. I tried using a diagonal as the line of symmetry but it didn’t work. So now I’m doubting that it has rotation symmetry."[br]Lin says, "I thought that too at first, but now I think that a parallelogram [i]does [/i]have rotation symmetry. Here, look at this."[br]

IM G Unit 1 Lesson 16 from IM Geometry by Illustrative Mathematics, https://im.kendallhunt.com/HS/students/2/1/16/index.html. Licensed under the Creative Commons Attribution 4.0 license, [url=https://creativecommons.org/licenses/by/4.0/]https://creativecommons.org/licenses/by/4.0/[/url].