I'm going to solve CSES geometry section live on Saturday (tomorrow) while explaining and drawing stuff to make it educational. There are seven problems. We'll start with the cross-product recap and eventually get to Convex Hull and Closest Pair Of Points. No prewritten code.

Problems: https://cses.fi/problemset

Watch on Twitch or Youtube https://www.twitch.tv/errichto, https://youtu.be/G9QTjWtK_TQ. The latter will be available later to rewatch too.