The problem Euclid couldn't solve

16:51
Euclid's Big Problem - Numberphile

54:06
Why are Most Polygons Impossible to Construct?

20:58
Measures of Central Tendency

13:40
The Amazing Heptadecagon (17-gon) - Numberphile

19:17
257-gon Construction

26:31
How to Take the Factorial of Any Number

12:27
Heptadecagon and Fermat Primes (the math bit) - Numberphile

45:04