Linear Algebra 21a: Rigid Transformations

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It's been years since I took a Linear algebra class but I think you are lucid and very understandable. Well done Pavel!

salsadancer
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What helped me intuitively grasp the Feynman Explanation was turning an  Image with coloured arrows on it towards a mirror around the x axis instead of the z axis like we usually do, so it IS upside down and the arrow that pointed to my left still Points to my left.

oliverhulesch
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Also, we can also do reflection about a line not passing through origin by translation and reflection and reverse translation, just like we did for rotation about non-origin point, right?

vineetbotix
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Sir,
When there is a slight tilt with a translation like you showed with prop, how can we prove that there exists a point that did not move? I could not imagine a point (origin ?) getting translated in X direction and rotated which comes back to original place.

vineetbotix