**Euclidean Geometry**

The main area of study in high school geometry. This is the geometry of axioms, theorems, and two-column proofs. It includes the study of points, lines, triangles, quadrilaterals, other polygons, circles, spheres, prisms, pyramids, cones, cylinders, etc.

Note: Euclidean geometry is named for Euclid, a Greek who lived 2500 years ago and wrote *Elements*, a book that has survived to the present day as the standard source book for Euclidean geometry.

**See also**

Plane geometry, solid geometry, analytic geometry, non-Euclidean geometry

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