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MathAdam

Jun 21, 2021

3 min read

Dandelin Spheres. Dandelion image by Capri23auto from Pixabay

Dandelin’s Delightful Spheres

An ingenious use of spheres sheds light on this conic section

Mathematicians have been slicing open cones since the 4th Century BC. Here, we study one of these famous cross sections — the ellipse. Along the way, we’ll discover a beautiful proof from Germinal Dandelin of the 19th Century.

The Ellipse — Two Seemingly Unrelated…

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Dandelin’s Delightful Spheres

An ingenious use of spheres sheds light on this conic section

The Ellipse — Two Seemingly Unrelated…

More from MathAdam

Recommended from Medium

Understanding quantum bit notation

The wonders of The Fibonacci series

Random Walks And Diffusion

After ANOVA Testing: What’s next? The Power of Fisher’s Least Significant Difference Method(LSD).

Me & Mathematics

Simple Math You Could Use if Google Isn’t Available

Solution to the Do-the-antiderivative-wrong Challenge

Think of a Number

Get the Medium app

Adam Hrankowski, ADHD

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