{"fact":"When a cat chases its prey, it keeps its head level. Dogs and humans bob their heads up and down.","length":97}
{"type":"standard","title":"Reflection symmetry","displaytitle":"Reflection symmetry","namespace":{"id":0,"text":""},"wikibase_item":"Q15955882","titles":{"canonical":"Reflection_symmetry","normalized":"Reflection symmetry","display":"Reflection symmetry"},"pageid":1390873,"thumbnail":{"source":"https://upload.wikimedia.org/wikipedia/commons/thumb/2/2d/Symmetry.png/330px-Symmetry.png","width":320,"height":314},"originalimage":{"source":"https://upload.wikimedia.org/wikipedia/commons/2/2d/Symmetry.png","width":468,"height":459},"lang":"en","dir":"ltr","revision":"1278040251","tid":"f87c6784-f589-11ef-8569-51742601fe76","timestamp":"2025-02-28T04:10:40Z","description":"Invariance under a mathematical reflection","description_source":"local","content_urls":{"desktop":{"page":"https://en.wikipedia.org/wiki/Reflection_symmetry","revisions":"https://en.wikipedia.org/wiki/Reflection_symmetry?action=history","edit":"https://en.wikipedia.org/wiki/Reflection_symmetry?action=edit","talk":"https://en.wikipedia.org/wiki/Talk:Reflection_symmetry"},"mobile":{"page":"https://en.m.wikipedia.org/wiki/Reflection_symmetry","revisions":"https://en.m.wikipedia.org/wiki/Special:History/Reflection_symmetry","edit":"https://en.m.wikipedia.org/wiki/Reflection_symmetry?action=edit","talk":"https://en.m.wikipedia.org/wiki/Talk:Reflection_symmetry"}},"extract":"In mathematics, reflection symmetry, line symmetry, mirror symmetry, or mirror-image symmetry is symmetry with respect to a reflection. That is, a figure which does not change upon undergoing a reflection has reflectional symmetry.","extract_html":"
In mathematics, reflection symmetry, line symmetry, mirror symmetry, or mirror-image symmetry is symmetry with respect to a reflection. That is, a figure which does not change upon undergoing a reflection has reflectional symmetry.
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