This lesson focuses on dilations, a dilation is a transformation that resizes a geometric shape, by making it bigger or smaller.

A transformation is a function that takes points in the plane as inputs and gives other points as outputs. You can think of a transformation as a rule that tells you how to create new points from old points.

If the speed of light remains a constant then time and distance change. Oh, it can be confusing! This text will help clear up the confusion. Discussion questions should serve to reinforce comprehension.and exercises

Learn how similarity transformation is one or more rigid transformations (reflection, rotation, translation) followed by a dilation.

To make sense of this, you have to first see the Twin Paradox: Introduction, which is the special relativity version and is linked to this page. This general relativity explanation views the paradox from a gravitational point of view.

Provides an explanation, examples, and a video lesson all related to the four common types of transformation. [1:00]