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.

Sep 12, 2025 · 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 all about shapes and their properties. If you like playing with objects, or like drawing, then geometry is for you!

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

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

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

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! …

Two types of geometry are plane geometry and solid geometry. Plane geometry deals with two-dimensional shapes and planes (x-axis and y-axis), while solid geometry deals with three …

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 …