Geometry

If you're studying geometry, you're seeing symbols everywhere - symbols for arcs and angles, lines and triangles as well as symbols for the relationships between lines and angles and so on.

Get up to speed on the core foundations of geometry.

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Sacred geometry refers to geometric forms that were once used in the design of holy sites, including western churches and cathedrals.

The word geometry originates from the Greek words (geo meaning world, metri meaning measure) and means, literally, to measure the earth. It is an ancient branch of mathematics, but its modern meaning depends largely on context.

Geometry is a branch of mathematics concerned with questions of shape, size, relative position of figures, and the properties of space.

This section is all about key geometric concepts, theorems, and proofs. Learn how to write mathematical arguments in the form of a two-column geometric proof and study the different properties of shapes by working through these insightful lessons.

Math lessons, videos, online tutoring, and more for free. All the geometry help you need right here, all free. Also math games, puzzles, articles, and other math help resources.

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In geometry we are concerned with the nature of these shapes, how we define them, and what they teach us about the world at large - from math to architecture to biology to astronomy (and everything in between). Some of the specific topics we'll cover include angles, intersecting lines, right triangles, perimeter, area, volume, circles, triangles, quadrilaterals, analytic geometry, and geometric constructions.