Basic Geometry: Math Videos

This short series covers a few key geometry skills. You will find the volume and surface area of solids like cylinders, learn the triangle inequality theorem, and prove how to find a triangle's area. You will also meet Heron's formula, a way to find a triangle's area from its three sides, and the Koch snowflake, a fascinating fractal shape. Despite the title, some of this goes beyond the basics. Comfort with basic algebra will help.

Note: All Khan Academy content is available for free at www.khanacademy.org