Alg & Geo 3: Regular Pentagon

Round-10 hunt: picked; channel-level screens (sellers/exam/re-upload/devotional/vendor/events) and provenance check passed; strict per-title check + final strict pass; oEmbed verified.

A 23-minute video from Zvi Rosen: “Alg & Geo 3: Regular Pentagon”.

Video by Zvi Rosen, played through YouTube's embedded player.