| # Draw an open 4-segment orthogonal chain |
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| Using only Autodesk Fusion's visible user interface, complete the sketch task below. Work in the root component and use millimetres. Do not use scripts, add-ins, the API, or any external CAD program. |
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| ## Starting state |
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| The supplied design is a clean parametric design in millimetres. It contains only the root component and Origin; it has no sketches, components, features, construction planes, or bodies. |
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| ## Required result |
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| Create exactly one new 2D sketch on the YZ origin plane. Select that plane directly from the Origin folder when Fusion asks for the sketch plane. |
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| All coordinates below are local sketch coordinates in millimetres. X and Y refer to the axes displayed while editing the sketch, viewed normal to the selected sketch plane. They describe the required final geometry: establish them with dimensions and geometric constraints rather than relying on visual grid placement. Unless a requirement names a particular operation or constraint, any visible-UI construction sequence that produces the same final geometry is acceptable. |
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| 1. Draw a regular, non-construction line from (-13, -19) mm to (-32, -19) mm. |
| 2. Draw a regular, non-construction line from (-32, -19) mm to (-32, -37) mm. |
| 3. Draw a regular, non-construction line from (-32, -37) mm to (-43, -37) mm. |
| 4. Draw a regular, non-construction line from (-43, -37) mm to (-43, -49) mm. |
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| ## Constraints and design intent |
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| - Connect these points in order: (-13, -19) mm, (-32, -19) mm, (-32, -37) mm, (-43, -37) mm, (-43, -49) mm. |
| - Every consecutive pair must share one truly coincident endpoint. |
| - Keep exactly 4 regular line entities and leave the chain open. |
| - The finished sketch must report that it is fully constrained. Use dimensions and geometric constraints as needed while preserving the exact geometry above. |
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| ## Completion requirements |
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| - The final design must contain exactly 1 sketch and 0 solid or surface bodies. |
| - The requested geometry must produce exactly 0 closed sketch profiles. |
| - Use regular sketch geometry unless an entity is explicitly described as construction geometry. |
| - Do not add extra sketches, curves, points, projected geometry, text, components, features, or bodies. |
| - Finish the sketch and leave the completed design open in Fusion. |
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| Recommended interaction budget: 82 steps and 300 seconds. |
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| Do not use Save or Save As. Do not open or import any external CAD file, including another task seed or answer. The environment exports the open design automatically; use the finish action when the task is complete. |
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