Uploaded December 2025 | Updated September 2026, 2 weeks ago

---

🛍 Check out my math fashion brand! mathshion.com
❤️ Join the channel to get exclusive and early videos, original music, math lectures, and more!
youtube.com/channel/UCyEKvaxi8mt9FMc62MHcliw/join

We solve a geometry puzzle from The Sea Island Mathematical Manual by Liu Hui, the Chinese mathematician who wrote a well regarded commentary of The Nine Chapters of the Mathematical Art and has many other significant accomplishments to his name. Can you solve it like Liu Hui did almost 1800 years ago? #mathpuzzle #mathproblems #maths

More Math Chats: youtube.com/playlist?list=PLztBpqftvzxXQDmPmSOwXSU9vOHgty1RO
Business Inquiries: wrathofmathlessons@gmail.com

Textbooks I Like!
Graph Theory: amzn.to/3JHQtZj
Real Analysis: amzn.to/3CMdgjI
Abstract Algebra: amzn.to/3IjoZaO
Linear Algebra: amzn.to/43xAWEz
Calculus: amzn.to/3PieD1M
Proofs and Set Theory: amzn.to/367VBXP (available for free online)
Statistics: amzn.to/4d5HbUQ
Discrete Math: amzn.to/3qfhoUn
Number Theory: amzn.to/3JqpOQd

Outro music: youtube.com/shorts/tfifiSdTZRg

Follow Wrath of Math on...
● Instagram: instagram.com/wrathofmathedu
● TikTok: tiktok.com/@wrathofmathedu
● X: https://x.com/wrathofmathedu

SOURCES
Significant Figured by Ian Stewart
old.maa.org/press/periodicals/convergence/a-classic-from-china-the-nine-chapters-introduction-and-history
https://people.math.harvard.edu/~knill/teaching/math22a2018/exhibits/gaussjordan/SchwarzNineChapters.pdf
https://mysinology.org.my/wp-content/uploads/2020/01/%E6%B4%AA%E5%A4%A9%E8%B3%9C-The-Sea-Island-Mathematical-Manual.pdf
my.clevelandclinic.org/health/procedures/21922-appendectomy

0:00 Intro
3:17 Solution
8:23 Conclusion