Geometry · Foundation · 9 min
Rotations
Rotation turns every point through the same angle around a fixed center.
WHAT HAPPENS IF…Where does (2.5,0) go after a 90° turn?
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The columns of the rotation matrix are perpendicular unit vectors. Therefore dot products and distances are preserved. Its determinant is 1, so area and orientation are preserved as well.
A detail that matters
Rotation about a different center requires translating to that center and translating back.
Keep the connection going
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