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Maths: the colorful mathematical constant of Pi Keychain
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Aluminum Circle
+$2.15
+$2.15
+$10.60
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Maths: the colorful mathematical constant of Pi Keychain
The mathematical constant of Pi can be a pretty. If you are a genius that is! Put some color to the number Pi and suddenly maths doesn't look so dull any more. Geometry, Algebra and Trigonometry were my favorite subjects at school. Ok, call me a nerd or a geek... Those years my room looked like the chaos theory in action! Some of my geeky friends even studied mathematics at university and one became an engineer. The other is still a physics student, working with the constant of Pi every day. Even Einstein understood the value of Pi. Not sure if he used it in any of his calculations though. Remember Calculus or Archimedes? Anyway, this is a brainy gift for you or your nerdy, clever friends!
Customer Reviews
4.6 out of 5 stars rating5.4K Total Reviews
5,405 Reviews
Reviews for similar products
5 out of 5 stars rating
By Ali Y.February 4, 2026 • Verified Purchase
Aluminum Circle, 2"
Lovely & cute keychains i love them thank you sooo much ,they also reached to me soo fast 😍.
5 out of 5 stars rating
By linda f.June 18, 2025 • Verified Purchase
Premium Round, Small (1.44")
So cute and this is perfect!!!
5 out of 5 stars rating
By Christina J.March 11, 2024 • Verified Purchase
Premium Round, Large (2.125")
These are a durable metal and the colors are vibrant. One of the clasp came broken but received a new one quickly. Customer service was responsive and quick to resolve the issue. They are bigger than I thought but still work for my wedding. I am satisfied with the print quality and surprised at how vibrant the colors are.
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Product ID: 146121248339813666
Created on: 7/14/2010, 7:24 AM
Rating: G
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