Clever Christmas ornaments of circle and sphere formulae by Quaternion Creations. [Their site] [Thei
![Clever Christmas ornaments of circle and sphere formulae by Quaternion Creations. [Their site] [Thei](https://64.media.tumblr.com/3599a42b9f93acbd1139bb7618e0667a/2cbe4d2254502885-98/s1280x1920/1a990afcac141b6c83606cc5aa54cb95c9a12008.jpg "Clever Christmas ornaments of circle and sphere formulae by Quaternion Creations. [Their site] [Thei")
![Clever Christmas ornaments of circle and sphere formulae by Quaternion Creations. [Their site] [Thei](https://64.media.tumblr.com/620ae017de1700579b211bc146ae807c/2cbe4d2254502885-65/s1280x1920/e528f032a166d0d9d5d8aeb1d652336f990f1ad1.jpg "Clever Christmas ornaments of circle and sphere formulae by Quaternion Creations. [Their site] [Thei")
Clever Christmas ornaments of circle and sphere formulae by Quaternion Creations. [Their site] [Their Etsy] -- source link
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