Matt_Parker_2 | MPMSolution: the optimal ellipse puzzle @mattparker2 | Uploaded 4 years ago | Updated 2 hours ago
This is the solution to the Optimal Ellipse problem.
http://think-maths.co.uk/ellipsepuzzle
youtube.com/watch?v=qJSHdJX6gB0

League table is here:
think-maths.co.uk/league-table

All details about Matt Parker's Maths Puzzles are on the Think Maths website:
think-maths.co.uk/maths-puzzles

Ellipse: 4 (pin & string method) by TechSquare
youtube.com/watch?v=Et3OdzEGX_w

Matías Brun's solution
desmos.com/calculator/wyyju8abx5