RT @MrHonner: 81818 -- Happy Rotational Symmetry / Reflective Symmetry / Palindrome Day! https://t.co/0tOmlGql5X #math #mathchat #81818 https://t.co/a3xWkAGwQJ - The Calculator Guide from Twitter

81818 -- Happy Rotational Symmetry / Reflective Symmetry / Palindrome Day!https://t.co/0tOmlGql5X#math #mathchat #81818 pic.twitter.com/a3xWkAGwQJ

— Patrick Honner (@MrHonner) August 18, 2018

from Twitter https://twitter.com/GuideCalculator

August 19, 2018 at 02:46PM
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