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| 3/3/26 | 4 | 4 | → |
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| 2/24/26 | 4 | 4 | → |
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| 2/19/26 | 4 | 4 | → |
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A hinge is a mechanical bearing that connects two solid objects, typically allowing only a limited angle of rotation between them. Two objects connected by an ideal hinge rotate relative to each other about a fixed axis of rotation, and all other translations or rotations are prevented; thus a hinge has one degree of freedom.