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What is geometry?

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Quick answer

Geometry is the branch of mathematics about shapes, sizes, positions, and space — points, lines, angles, surfaces, and solids. It's used everywhere from architecture and art to navigation and computer graphics. It studies shapes and their properties (length, area, angle, volume).

Key things to understand

  1. It studies shapes and their properties (length, area, angle, volume).
  2. Includes 2D shapes (triangles, circles) and 3D solids (cubes, spheres).
  3. Key ideas: angles, symmetry, congruence, and the Pythagorean theorem.
  4. It underpins design, engineering, maps, and graphics.

People also ask

What is geometry used for?
Architecture, engineering, art, navigation, computer graphics, and everyday measuring.
What are the basic elements of geometry?
Points, lines, angles, surfaces, and solids.
What's the difference between 2D and 3D geometry?
2D deals with flat shapes (area); 3D deals with solid objects (volume).