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.

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

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!

Dec 3, 2025 · Geometry is the study of figures in a space of a given number of dimensions and of a given type.

Apr 30, 2025 · Geometry helps us understand shapes and spaces, and is part of math from early schooling onwards. We use geometry every day, like when we park a car or create art and buildings. …

Geometry is a branch of mathematics that includes the study of shape, size, and other properties of figures. It is one of the oldest branches of mathematics and may have been used even in prehistoric …

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 …

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 …

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