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.

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

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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.

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