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.

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 …

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

Geometry Dash is notorious for its difficulty. Levels are short bursts of concentrated chaos, designed to test your patience and precision. But within this challenge lies a surprisingly rewarding experience.

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

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

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 …

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

Step up the challenge and find out who becomes the best Geometry Dasher! Enjoy the impossibility of Geometry Dash, a rhythm-based running game, and enjoy a musical adventure that requires …