Learn geometry—angles, shapes, transformations, proofs, and more.

Geometry is, along with arithmetic, one of the oldest branches of mathematics. A mathematician who works in the field of geometry is called a geometer.

Challenge your reflexes in Geometry Dash, a rhythm-based action platformer with endless player-created levels! Jump, fly & conquer unique challenges. Play now!

Geometry is all about shapes and their properties. If you like playing with objects, or like drawing, then geometry is for you!

Apr 17, 2026 · Geometry, the branch of mathematics concerned with the shape of individual objects, spatial relationships among various objects, and the properties of surrounding space.

Interactive, free online geometry tool from GeoGebra: create triangles, circles, angles, transformations and much more!

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