Aloha

less than 1 minute read

I’m on mid winter break with the kids for the week in Oahu.

In the meantime check out my collected problems which are almost at 30 in total: http://mymathclub.blogspot.com/p/collected-problems-2.html

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Four Triangle in a Box

July 20, 2026 1 minute read

I ran into an old problem I’ve seen multiple times but apparently never wrote a blog entry on.

Focal chords in a parabola

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Intro The following problem came up on reddit:

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As the curriculum sequence is normally presented, we don’t usually consider tangent lines to curves until Calculus. As a result, taking a derivative might se...