Learn high school geometry—transformations, congruence, similarity, trigonometry, analytic geometry, and more (aligned with Common Core standards).

Explore geometry concepts including angles, shapes, transformations, and proofs with Khan Academy's engaging resources.

Cylinder volume & surface area Volume of a sphere Volume of a cone Geometry: FAQ

This Basic geometry and measurement course is a refresher of length, area, perimeter, volume, angle measure, and transformations of 2D and 3D figures. If you are learning the content for …

Geometry (all content) Unit 1: Lines Lines, line segments, and rays Measuring segments Parallel and perpendicular Points, lines, & planes Geometric definitions The golden ratio

Geometry (all content) 17 units · 180 skills Unit 1 Lines Unit 2 Angles Unit 4 Triangles

Get ready for high school geometry! Learn the skills that will set you up for success in congruence, similarity, and triangle trigonometry; analytic geometry; conic sections; and circles …

Geometry (all content) 17 units · 180 skills Unit 1 Lines Unit 2 Angles Unit 3 Shapes

Geometry (all content) 17 units · 180 skills Unit 1 Lines Unit 3 Shapes Unit 4 Triangles

Geometric shapes are all around us. The world is built with them. In this series of tutorials and exercises you'll become familiar with Euclidean geometry and terms like scale drawings, parts …