# Geometry

We are surrounded by space. And that space contains lots of things. And these things have shapes. 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). Learning geometry is about more than just taking your medicine ("It's good for you!"), it's at the core of everything that exists--including you. Having said all that, 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. Wow. That's a lot. To summarize: it's difficult to imagine any area of math that is more widely used than geometry.
Community Questions

# Transformations

Let's think more visually about things like shifts, rotations, scaling and symmetry.
All content in “Transformations”

## Properties and definitions of transformations

Let's continue our deep voyage through the world of transformations by thinking about how points map to each other after a transformation.

## Symmetry

Let's get an intuitive understanding for symmetry of two dimensional shapes.

## Dilations or scaling around a point

We understand the idea of scaling/dilation from everyday life (hey, let's make it bigger or smaller keeping the same proportions!). In this tutorial, you'll understand this type of transformation in a much, much deeper way.