Khan Academy
Introduction to Transformations
Translations, reflections, and rotations explained.
Watch on YouTubeSlide, flip, and turn figures while keeping their size and shape.
Read this first — it covers the idea in plain language with a worked example.
Key idea
Rigid transformations preserve lengths and angles, so the image is congruent to the original.
Translate the point (2, 3) right 4 and down 1.
A short video that walks through this topic.
Translations, reflections, and rotations explained.
Watch on YouTubeTry a worksheet or work through some problems before the quiz.
A couple of questions to make sure this topic stuck. Retake as many times as you want.
Transformations
Which transformation is NOT rigid (does not preserve size)?