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.

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

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

Get ready to jump, fly, and dash your way through danger-filled levels synced to an epic soundtrack. Experience the infectious music, vibrant visuals, and notoriously tough gameplay you loved in …

Feb 3, 2026 · Geometry, the branch of mathematics concerned with the shape of individual objects, spatial relationships among various objects, and the properties of surrounding space.

Geometry is a part of mathematics that deals with the relationships of points, lines, angles, surfaces, solids measurement, and properties. There are two types of geometry: 2D or plane geometry and 3D …

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

Whether you're a casual player seeking quick entertainment or a hardcore gamer chasing perfect completion rates, Geometry Dash offers endless geometric challenges that test reflexes, memory, …

Essential stuff for describing the world around you. 1. Lines and angles. 2. Related angles. What about angles bigger than 360 degrees? 3. Triangles. See if it's really true, and then prove it! They have two …