30-60-90 Triangles II
Why it's on BrighterTube
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What you'll learn
A 5-minute video from Khan Academy's catalogue; the title names its topic.
Video by Khan Academy, played through YouTube's embedded player.
Part of Geometry
Go deeper
- Euclid's Elements (Green Lion Press)Euclid's Elements, the original geometry book, in a clear edition
- The Art of Problem Solving Vol. 1, Lehoczky & RusczykThe Art of Problem Solving, great for geometry problems
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