- Geometry - Wikipedia
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
- Geometry (all content) - Khan Academy
Learn geometry—angles, shapes, transformations, proofs, and more
- Geometry - Math is Fun
Geometry is all about shapes and their properties If you like playing with objects, or like drawing, then geometry is for you!
- Geometry | Definition, History, Basics, Branches, Facts | Britannica
Geometry, the branch of mathematics concerned with the shape of individual objects, spatial relationships among various objects, and the properties of surrounding space
- Geometry lessons - School Yourself
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 equal sides, but what about their angles? In triangles, sides and their opposite angles are related! 4 Triangle congruence and similarity
- Geometry - GeoGebra
Interactive, free online geometry tool from GeoGebra: create triangles, circles, angles, transformations and much more!
- Geometry - Formulas, Examples | Plane and Solid Geometry - Cuemath
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-dimensional objects and 3D planes
- Geometry — Mathwords
Geometry is the branch of mathematics concerned with the properties, measurement, and relationships of points, lines, angles, surfaces, and solids
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